/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-cav19/array_init_var_plus_ind2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 18:58:27,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 18:58:27,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 18:58:27,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 18:58:27,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 18:58:27,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 18:58:27,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 18:58:27,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 18:58:27,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 18:58:27,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 18:58:27,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 18:58:27,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 18:58:27,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 18:58:27,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 18:58:27,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 18:58:27,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 18:58:27,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 18:58:27,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 18:58:27,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 18:58:27,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 18:58:27,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 18:58:27,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 18:58:27,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 18:58:27,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 18:58:27,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 18:58:27,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 18:58:27,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 18:58:27,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 18:58:27,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 18:58:27,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 18:58:27,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 18:58:27,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 18:58:27,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 18:58:27,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 18:58:27,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 18:58:27,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 18:58:27,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 18:58:27,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 18:58:27,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 18:58:27,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 18:58:27,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 18:58:27,519 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 18:58:27,580 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 18:58:27,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 18:58:27,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 18:58:27,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 18:58:27,585 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 18:58:27,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 18:58:27,586 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 18:58:27,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 18:58:27,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 18:58:27,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 18:58:27,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 18:58:27,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 18:58:27,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 18:58:27,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 18:58:27,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 18:58:27,589 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 18:58:27,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 18:58:27,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 18:58:27,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 18:58:27,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 18:58:27,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 18:58:27,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 18:58:27,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 18:58:27,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 18:58:27,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 18:58:27,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 18:58:27,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 18:58:27,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 18:58:27,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 18:58:27,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 18:58:28,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 18:58:28,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 18:58:28,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 18:58:28,096 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 18:58:28,097 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 18:58:28,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2020-10-26 18:58:28,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6e9f4d85/728ad795eb614948963293aa8781f9ed/FLAG6952e444d [2020-10-26 18:58:28,882 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 18:58:28,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2020-10-26 18:58:28,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6e9f4d85/728ad795eb614948963293aa8781f9ed/FLAG6952e444d [2020-10-26 18:58:29,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6e9f4d85/728ad795eb614948963293aa8781f9ed [2020-10-26 18:58:29,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 18:58:29,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 18:58:29,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:29,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 18:58:29,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 18:58:29,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6357fd 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 18:58:29,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 18:58:29,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 18:58:29,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,511 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 18:58:29,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,554 INFO L208 MainTranslator]: Completed translation [2020-10-26 18:58:29,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29 WrapperNode [2020-10-26 18:58:29,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:29,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 18:58:29,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 18:58:29,574 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 18:58:29,574 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 18:58:29,583 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 18:58:29,583 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 18:58:29,591 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 18:58:29,596 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 18:58:29,598 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 18:58:29,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 18:58:29,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 18:58:29,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 18:58:29,603 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 18:58:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 18:58:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 18:58:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 18:58:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 18:58:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 18:58:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 18:58:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 18:58:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 18:58:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 18:58:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 18:58:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 18:58:29,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 18:58:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 18:58:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 18:58:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 18:58:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 18:58:29,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 18:58:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 18:58:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 18:58:29,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 18:58:30,278 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 18:58:30,279 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 18:58:30,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:58:30 BoogieIcfgContainer [2020-10-26 18:58:30,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 18:58:30,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 18:58:30,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 18:58:30,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 18:58:30,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 06:58:29" (1/3) ... [2020-10-26 18:58:30,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9a92e0 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 18:58:30,291 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 18:58:30,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c9a92e0 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 18:58:30,292 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 18:58:30,295 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2020-10-26 18:58:30,309 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 18:58:30,314 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 18:58:30,331 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 18:58:30,375 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 18:58:30,375 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 18:58:30,375 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 18:58:30,376 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 18:58:30,376 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 18:58:30,376 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 18:58:30,376 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 18:58:30,376 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 18:58:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-26 18:58:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 18:58:30,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:30,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:30,412 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:30,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:30,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1582220556, now seen corresponding path program 1 times [2020-10-26 18:58:30,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:30,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280529496] [2020-10-26 18:58:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:30,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 18:58:31,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:31,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-26 18:58:31,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:31,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:31,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:31,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 18:58:31,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:31,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:31,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 18:58:31,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:31,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:31,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280529496] [2020-10-26 18:58:31,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 18:58:31,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 18:58:31,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799432216] [2020-10-26 18:58:31,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 18:58:31,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:31,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 18:58:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 18:58:31,314 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-10-26 18:58:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:31,614 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2020-10-26 18:58:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 18:58:31,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-26 18:58:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:31,626 INFO L225 Difference]: With dead ends: 57 [2020-10-26 18:58:31,627 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 18:58:31,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 18:58:31,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-10-26 18:58:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 18:58:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-26 18:58:31,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2020-10-26 18:58:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:31,682 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-26 18:58:31,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 18:58:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-26 18:58:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 18:58:31,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:31,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:31,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 18:58:31,684 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2112687446, now seen corresponding path program 1 times [2020-10-26 18:58:31,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:31,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007590725] [2020-10-26 18:58:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 18:58:31,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:31,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 18:58:31,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 18:58:31,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:31,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:31,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:31,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 18:58:31,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:31,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:31,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:31,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:31,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007590725] [2020-10-26 18:58:31,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 18:58:31,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 18:58:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678950069] [2020-10-26 18:58:31,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 18:58:31,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:31,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 18:58:31,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 18:58:31,932 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-26 18:58:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:32,053 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-26 18:58:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 18:58:32,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-26 18:58:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:32,055 INFO L225 Difference]: With dead ends: 37 [2020-10-26 18:58:32,056 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 18:58:32,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 18:58:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 18:58:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-26 18:58:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 18:58:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-26 18:58:32,065 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-10-26 18:58:32,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:32,066 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-26 18:58:32,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 18:58:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-26 18:58:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 18:58:32,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:32,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:32,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 18:58:32,067 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash 996586641, now seen corresponding path program 1 times [2020-10-26 18:58:32,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:32,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492615834] [2020-10-26 18:58:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:32,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:32,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 18:58:32,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:32,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-26 18:58:32,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 18:58:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:32,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:32,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:32,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:32,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:32,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 18:58:32,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:32,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:32,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:32,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:32,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:32,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492615834] [2020-10-26 18:58:32,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:32,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 18:58:32,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390859079] [2020-10-26 18:58:32,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 18:58:32,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 18:58:32,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:32,640 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-26 18:58:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:32,939 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-26 18:58:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 18:58:32,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-26 18:58:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:32,942 INFO L225 Difference]: With dead ends: 44 [2020-10-26 18:58:32,942 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 18:58:32,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:32,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 18:58:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-10-26 18:58:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 18:58:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-26 18:58:32,951 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-26 18:58:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:32,952 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-26 18:58:32,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 18:58:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-26 18:58:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 18:58:32,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:32,953 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:32,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 18:58:32,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1207497669, now seen corresponding path program 1 times [2020-10-26 18:58:32,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:32,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322709637] [2020-10-26 18:58:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:32,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 18:58:33,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:33,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-26 18:58:33,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:33,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:33,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:33,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:33,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 18:58:33,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:33,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:33,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:33,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:33,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322709637] [2020-10-26 18:58:33,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:33,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 18:58:33,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353583771] [2020-10-26 18:58:33,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 18:58:33,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:33,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 18:58:33,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:33,195 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-26 18:58:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:33,304 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-26 18:58:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 18:58:33,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-26 18:58:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:33,306 INFO L225 Difference]: With dead ends: 40 [2020-10-26 18:58:33,306 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 18:58:33,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:33,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 18:58:33,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-26 18:58:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 18:58:33,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-26 18:58:33,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-26 18:58:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:33,314 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-26 18:58:33,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 18:58:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-26 18:58:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 18:58:33,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:33,315 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:33,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 18:58:33,315 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash 533781228, now seen corresponding path program 2 times [2020-10-26 18:58:33,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:33,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942285314] [2020-10-26 18:58:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 18:58:34,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:34,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-26 18:58:34,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:34,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 18:58:34,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:34,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:34,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 18:58:34,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:34,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:34,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942285314] [2020-10-26 18:58:34,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:34,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 18:58:34,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311510316] [2020-10-26 18:58:34,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 18:58:34,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:34,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 18:58:34,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:34,274 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-26 18:58:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:34,568 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-26 18:58:34,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 18:58:34,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-26 18:58:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:34,571 INFO L225 Difference]: With dead ends: 47 [2020-10-26 18:58:34,571 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 18:58:34,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:58:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 18:58:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-10-26 18:58:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 18:58:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-26 18:58:34,579 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-10-26 18:58:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:34,580 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-26 18:58:34,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 18:58:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-26 18:58:34,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 18:58:34,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:34,581 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:34,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 18:58:34,581 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:34,582 INFO L82 PathProgramCache]: Analyzing trace with hash -254568246, now seen corresponding path program 2 times [2020-10-26 18:58:34,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:34,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435431578] [2020-10-26 18:58:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 18:58:34,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:34,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-26 18:58:34,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:58:34,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:34,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 18:58:34,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:35,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:35,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:35,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:35,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:35,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:58:35,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:35,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:35,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:35,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435431578] [2020-10-26 18:58:35,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:35,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 18:58:35,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954505496] [2020-10-26 18:58:35,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 18:58:35,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:35,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 18:58:35,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:35,161 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2020-10-26 18:58:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:35,641 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-26 18:58:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 18:58:35,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-26 18:58:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:35,644 INFO L225 Difference]: With dead ends: 45 [2020-10-26 18:58:35,645 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 18:58:35,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-26 18:58:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 18:58:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-26 18:58:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 18:58:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-26 18:58:35,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2020-10-26 18:58:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:35,665 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-26 18:58:35,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 18:58:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-26 18:58:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 18:58:35,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:35,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:35,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 18:58:35,669 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash -57257295, now seen corresponding path program 3 times [2020-10-26 18:58:35,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:35,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472850579] [2020-10-26 18:58:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:35,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:36,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:36,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 18:58:36,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:36,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 875 [2020-10-26 18:58:36,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:36,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:36,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:36,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 18:58:36,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:36,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:36,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:36,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:36,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:36,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 18:58:36,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:36,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:36,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:36,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472850579] [2020-10-26 18:58:36,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:36,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 18:58:36,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134195017] [2020-10-26 18:58:36,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 18:58:36,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:36,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 18:58:36,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 18:58:36,673 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 8 states. [2020-10-26 18:58:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:36,900 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-26 18:58:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 18:58:36,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-26 18:58:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:36,903 INFO L225 Difference]: With dead ends: 61 [2020-10-26 18:58:36,903 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 18:58:36,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:58:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 18:58:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-26 18:58:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 18:58:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-26 18:58:36,913 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2020-10-26 18:58:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:36,913 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-26 18:58:36,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 18:58:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-26 18:58:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 18:58:36,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:36,914 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:36,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 18:58:36,915 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1396893275, now seen corresponding path program 3 times [2020-10-26 18:58:36,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:36,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029940521] [2020-10-26 18:58:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:37,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:37,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:37,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 18:58:37,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:37,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-26 18:58:37,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:37,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 18:58:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 18:58:37,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:37,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:37,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:37,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:37,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:37,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:37,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 18:58:37,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:37,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:37,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:37,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:37,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:37,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029940521] [2020-10-26 18:58:37,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:37,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 18:58:37,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567980432] [2020-10-26 18:58:37,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 18:58:37,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 18:58:37,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 18:58:37,545 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2020-10-26 18:58:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:38,025 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-26 18:58:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 18:58:38,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-26 18:58:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:38,027 INFO L225 Difference]: With dead ends: 59 [2020-10-26 18:58:38,027 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 18:58:38,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:58:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 18:58:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-10-26 18:58:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 18:58:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 18:58:38,037 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 24 [2020-10-26 18:58:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:38,038 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 18:58:38,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 18:58:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 18:58:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 18:58:38,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:38,039 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:38,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 18:58:38,040 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1680017612, now seen corresponding path program 4 times [2020-10-26 18:58:38,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:38,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690227850] [2020-10-26 18:58:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:38,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:39,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:39,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 18:58:39,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:58:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1467 [2020-10-26 18:58:39,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:58:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 18:58:39,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:39,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:39,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:39,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:39,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:39,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 18:58:39,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:39,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:39,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690227850] [2020-10-26 18:58:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:39,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 18:58:39,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695072838] [2020-10-26 18:58:39,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 18:58:39,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:39,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 18:58:39,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:39,683 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2020-10-26 18:58:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:40,075 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-26 18:58:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 18:58:40,077 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-26 18:58:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:40,078 INFO L225 Difference]: With dead ends: 71 [2020-10-26 18:58:40,078 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 18:58:40,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-26 18:58:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 18:58:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2020-10-26 18:58:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 18:58:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-26 18:58:40,107 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 26 [2020-10-26 18:58:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:40,107 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-26 18:58:40,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 18:58:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-26 18:58:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 18:58:40,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:40,111 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:40,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 18:58:40,112 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:40,112 INFO L82 PathProgramCache]: Analyzing trace with hash 919021290, now seen corresponding path program 4 times [2020-10-26 18:58:40,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:40,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975706757] [2020-10-26 18:58:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:40,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:40,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:40,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:40,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:40,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 18:58:40,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:40,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-26 18:58:40,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:40,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 18:58:40,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:40,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 18:58:40,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:41,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:41,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:41,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:41,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:41,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:58:41,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:41,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:41,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975706757] [2020-10-26 18:58:41,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:41,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 18:58:41,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286174970] [2020-10-26 18:58:41,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 18:58:41,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:41,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 18:58:41,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-26 18:58:41,654 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 15 states. [2020-10-26 18:58:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:42,427 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-10-26 18:58:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 18:58:42,428 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-26 18:58:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:42,429 INFO L225 Difference]: With dead ends: 69 [2020-10-26 18:58:42,429 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 18:58:42,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-26 18:58:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 18:58:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2020-10-26 18:58:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 18:58:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-26 18:58:42,446 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 27 [2020-10-26 18:58:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:42,446 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-26 18:58:42,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 18:58:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-26 18:58:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 18:58:42,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:42,447 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:42,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 18:58:42,448 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:42,452 INFO L82 PathProgramCache]: Analyzing trace with hash 452753840, now seen corresponding path program 1 times [2020-10-26 18:58:42,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:42,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406830150] [2020-10-26 18:58:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:42,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:42,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:42,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 18:58:42,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:42,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-26 18:58:42,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:42,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:42,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:42,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 18:58:42,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:42,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:42,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:42,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:42,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:42,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:42,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:42,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:42,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:42,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-26 18:58:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:42,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:42,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:42,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:42,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:42,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:58:42,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:42,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:42,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:42,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:42,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:42,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406830150] [2020-10-26 18:58:42,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:42,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 18:58:42,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836605870] [2020-10-26 18:58:42,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 18:58:42,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:42,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 18:58:42,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 18:58:42,714 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 8 states. [2020-10-26 18:58:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:42,847 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-26 18:58:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 18:58:42,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-26 18:58:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:42,849 INFO L225 Difference]: With dead ends: 59 [2020-10-26 18:58:42,849 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 18:58:42,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 18:58:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 18:58:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 18:58:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 18:58:42,866 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2020-10-26 18:58:42,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:42,870 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 18:58:42,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 18:58:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 18:58:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 18:58:42,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:42,871 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:42,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 18:58:42,871 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:42,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1814112047, now seen corresponding path program 5 times [2020-10-26 18:58:42,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:42,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949244758] [2020-10-26 18:58:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:42,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:42,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:45,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:45,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 18:58:45,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:58:45,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2184 [2020-10-26 18:58:45,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:58:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:45,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 18:58:45,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:45,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:45,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:45,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:45,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:45,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:45,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 18:58:45,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:45,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:45,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949244758] [2020-10-26 18:58:45,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:45,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 18:58:45,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760530461] [2020-10-26 18:58:45,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 18:58:45,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:45,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 18:58:45,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:45,221 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2020-10-26 18:58:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:45,554 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-26 18:58:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 18:58:45,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-26 18:58:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:45,556 INFO L225 Difference]: With dead ends: 74 [2020-10-26 18:58:45,556 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 18:58:45,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:58:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 18:58:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2020-10-26 18:58:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 18:58:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-26 18:58:45,568 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 29 [2020-10-26 18:58:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:45,568 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-26 18:58:45,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 18:58:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-26 18:58:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 18:58:45,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:45,569 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:45,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 18:58:45,570 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:45,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:45,570 INFO L82 PathProgramCache]: Analyzing trace with hash -24815739, now seen corresponding path program 5 times [2020-10-26 18:58:45,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:45,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156681925] [2020-10-26 18:58:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:45,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:45,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:45,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:46,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:46,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 18:58:46,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:58:46,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1062 [2020-10-26 18:58:46,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 18:58:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:46,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 18:58:46,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:47,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:47,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:47,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:47,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:47,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:47,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:47,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:47,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:47,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156681925] [2020-10-26 18:58:47,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:47,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 18:58:47,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70351004] [2020-10-26 18:58:47,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 18:58:47,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 18:58:47,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:58:47,195 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 17 states. [2020-10-26 18:58:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:48,429 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-10-26 18:58:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 18:58:48,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-26 18:58:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:48,432 INFO L225 Difference]: With dead ends: 66 [2020-10-26 18:58:48,432 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 18:58:48,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-10-26 18:58:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 18:58:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2020-10-26 18:58:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 18:58:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-26 18:58:48,459 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 30 [2020-10-26 18:58:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:48,459 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-26 18:58:48,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 18:58:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-26 18:58:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 18:58:48,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:48,461 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:48,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 18:58:48,462 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:48,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:48,462 INFO L82 PathProgramCache]: Analyzing trace with hash -336531573, now seen corresponding path program 2 times [2020-10-26 18:58:48,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:48,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3136055] [2020-10-26 18:58:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:48,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:48,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:49,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 18:58:49,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:49,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-26 18:58:49,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:49,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 18:58:49,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:49,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 18:58:49,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:49,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:49,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:49,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:49,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:49,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:49,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:49,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:49,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:49,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:49,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:49,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 18:58:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:49,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:49,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:49,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:49,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 18:58:49,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:49,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:49,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:58:49,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:49,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3136055] [2020-10-26 18:58:49,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:49,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 18:58:49,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114450091] [2020-10-26 18:58:49,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 18:58:49,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:49,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 18:58:49,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:58:49,402 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 17 states. [2020-10-26 18:58:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:50,288 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-26 18:58:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 18:58:50,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-10-26 18:58:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:50,292 INFO L225 Difference]: With dead ends: 63 [2020-10-26 18:58:50,292 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 18:58:50,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-26 18:58:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 18:58:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-26 18:58:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 18:58:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-26 18:58:50,316 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2020-10-26 18:58:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:50,317 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-26 18:58:50,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 18:58:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-26 18:58:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 18:58:50,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:50,319 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:50,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 18:58:50,319 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:50,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1007675344, now seen corresponding path program 3 times [2020-10-26 18:58:50,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:50,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527232967] [2020-10-26 18:58:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:50,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:50,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:50,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:51,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:51,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:51,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:51,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 18:58:51,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:58:51,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-26 18:58:51,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:51,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 18:58:51,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:51,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 18:58:51,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:51,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:51,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:51,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:51,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:51,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:51,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:51,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:51,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:51,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:51,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:51,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:51,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 18:58:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:51,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:51,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:51,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:51,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 18:58:52,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:52,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:52,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:52,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:58:52,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527232967] [2020-10-26 18:58:52,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:52,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 18:58:52,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527278849] [2020-10-26 18:58:52,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 18:58:52,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:52,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 18:58:52,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-26 18:58:52,041 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 18 states. [2020-10-26 18:58:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:53,321 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2020-10-26 18:58:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 18:58:53,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-26 18:58:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:53,322 INFO L225 Difference]: With dead ends: 78 [2020-10-26 18:58:53,322 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 18:58:53,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 18:58:53,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 18:58:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-10-26 18:58:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 18:58:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-26 18:58:53,344 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 35 [2020-10-26 18:58:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:53,345 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-26 18:58:53,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 18:58:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-26 18:58:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 18:58:53,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:53,346 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:53,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 18:58:53,347 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:53,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:53,347 INFO L82 PathProgramCache]: Analyzing trace with hash 871787, now seen corresponding path program 4 times [2020-10-26 18:58:53,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:53,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120953481] [2020-10-26 18:58:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:53,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:54,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:54,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:55,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 18:58:55,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 18:58:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1935 [2020-10-26 18:58:55,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 18:58:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:55,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 18:58:55,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:55,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:55,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:55,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:55,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:55,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:55,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:55,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:55,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:55,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:55,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:55,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 18:58:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:55,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:55,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:55,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:55,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 18:58:55,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:55,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:55,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:58:55,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:55,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120953481] [2020-10-26 18:58:55,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:55,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 18:58:55,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195919652] [2020-10-26 18:58:55,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 18:58:55,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:55,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 18:58:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-26 18:58:55,951 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 20 states. [2020-10-26 18:58:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:58,135 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2020-10-26 18:58:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 18:58:58,135 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-26 18:58:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:58,137 INFO L225 Difference]: With dead ends: 95 [2020-10-26 18:58:58,137 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 18:58:58,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=264, Invalid=1716, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 18:58:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 18:58:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2020-10-26 18:58:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 18:58:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-26 18:58:58,156 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 38 [2020-10-26 18:58:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:58,157 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-26 18:58:58,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 18:58:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-26 18:58:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 18:58:58,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:58,158 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:58,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 18:58:58,159 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1845198705, now seen corresponding path program 5 times [2020-10-26 18:58:58,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:58,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251206932] [2020-10-26 18:58:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:58,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:58,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:58,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 18:58:58,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:58,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-26 18:58:58,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:58,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:58:58,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:58,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 18:58:58,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:58,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:58,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:58,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:58,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:58,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:58,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:58:58,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:58,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 18:58:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:58,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:58,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:58,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:58,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:58,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:58:58,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:58,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:58,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 18:58:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:58,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:58,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:58,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:58,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:58,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:58:58,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:58,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:58,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:58,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:58,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 18:58:58,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251206932] [2020-10-26 18:58:58,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:58,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 18:58:58,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434757292] [2020-10-26 18:58:58,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 18:58:58,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 18:58:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:58,507 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 10 states. [2020-10-26 18:58:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:58,753 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-26 18:58:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 18:58:58,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-26 18:58:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:58,754 INFO L225 Difference]: With dead ends: 78 [2020-10-26 18:58:58,755 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 18:58:58,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:58:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 18:58:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-26 18:58:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 18:58:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-26 18:58:58,772 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 40 [2020-10-26 18:58:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:58,773 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-26 18:58:58,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 18:58:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-26 18:58:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 18:58:58,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:58,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:58,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 18:58:58,774 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1726033298, now seen corresponding path program 1 times [2020-10-26 18:58:58,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:58,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190507181] [2020-10-26 18:58:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:58,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:58,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:59,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:59,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:59,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:03,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:03,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:03,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 18:59:03,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 18:59:03,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4701 [2020-10-26 18:59:03,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:03,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:59:03,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:03,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 18:59:03,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:03,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:03,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:03,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:03,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:03,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:03,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 18:59:03,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:03,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:03,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:03,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:03,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 18:59:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:03,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:03,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:03,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:03,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:03,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:03,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:03,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 18:59:03,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190507181] [2020-10-26 18:59:03,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:03,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 18:59:03,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830916977] [2020-10-26 18:59:03,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 18:59:03,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:03,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 18:59:03,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:59:03,653 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 11 states. [2020-10-26 18:59:04,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:04,008 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-26 18:59:04,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 18:59:04,009 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-26 18:59:04,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:04,010 INFO L225 Difference]: With dead ends: 97 [2020-10-26 18:59:04,011 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 18:59:04,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-26 18:59:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 18:59:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2020-10-26 18:59:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 18:59:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-26 18:59:04,033 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 40 [2020-10-26 18:59:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:04,033 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-26 18:59:04,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 18:59:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-26 18:59:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 18:59:04,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:04,035 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:04,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 18:59:04,036 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:04,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1927266832, now seen corresponding path program 6 times [2020-10-26 18:59:04,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:04,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276643866] [2020-10-26 18:59:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:04,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:05,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:05,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:05,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:05,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:07,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:07,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 18:59:07,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 18:59:07,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3124 [2020-10-26 18:59:07,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 18:59:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 18:59:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:08,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:08,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:08,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:08,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:08,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:08,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:08,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:08,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:08,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 18:59:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:08,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:08,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:08,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:08,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 18:59:08,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:59:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:59:08,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:59:08,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276643866] [2020-10-26 18:59:08,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:08,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 18:59:08,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555683777] [2020-10-26 18:59:08,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 18:59:08,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:08,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 18:59:08,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-26 18:59:08,238 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 21 states. [2020-10-26 18:59:09,042 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-26 18:59:09,331 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-26 18:59:09,649 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-26 18:59:09,938 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-26 18:59:10,105 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-26 18:59:10,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:10,957 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-10-26 18:59:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 18:59:10,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-26 18:59:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:10,958 INFO L225 Difference]: With dead ends: 81 [2020-10-26 18:59:10,958 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 18:59:10,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 18:59:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 18:59:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2020-10-26 18:59:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 18:59:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-26 18:59:10,977 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 41 [2020-10-26 18:59:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:10,977 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-26 18:59:10,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 18:59:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-26 18:59:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 18:59:10,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:10,978 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:10,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 18:59:10,979 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash 34890422, now seen corresponding path program 7 times [2020-10-26 18:59:10,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:10,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276899325] [2020-10-26 18:59:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:11,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:11,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:11,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:12,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 18:59:12,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:12,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1443 [2020-10-26 18:59:12,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:12,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 18:59:12,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:12,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 18:59:12,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:12,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:12,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:12,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:12,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:12,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:12,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:12,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:12,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:12,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:12,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:12,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 18:59:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:12,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:12,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:12,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:12,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:12,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:12,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:12,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:12,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:12,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:12,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 18:59:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:12,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:12,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:12,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:12,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:12,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:12,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:12,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:12,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:12,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:12,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 18:59:12,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276899325] [2020-10-26 18:59:12,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:12,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 18:59:12,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526576571] [2020-10-26 18:59:12,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 18:59:12,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:12,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 18:59:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-26 18:59:12,758 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 16 states. [2020-10-26 18:59:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:13,450 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-26 18:59:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 18:59:13,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-26 18:59:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:13,451 INFO L225 Difference]: With dead ends: 76 [2020-10-26 18:59:13,452 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 18:59:13,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-26 18:59:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 18:59:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-10-26 18:59:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 18:59:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-26 18:59:13,469 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 43 [2020-10-26 18:59:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:13,470 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-26 18:59:13,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 18:59:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-26 18:59:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 18:59:13,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:13,471 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:13,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 18:59:13,471 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:13,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1045167441, now seen corresponding path program 8 times [2020-10-26 18:59:13,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:13,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540490392] [2020-10-26 18:59:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:13,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:13,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:13,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:14,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:14,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:15,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:17,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:17,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 18:59:17,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 18:59:17,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4148 [2020-10-26 18:59:17,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 18:59:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:17,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 18:59:17,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:18,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:18,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:18,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:18,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:18,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:18,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:18,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:18,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:18,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:18,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:18,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 18:59:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:18,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:18,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:18,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:18,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:18,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:18,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:18,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:18,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:18,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:18,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 18:59:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:18,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:18,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:18,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:18,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 18:59:18,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:59:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:59:18,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 18:59:18,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540490392] [2020-10-26 18:59:18,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:18,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 18:59:18,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669004327] [2020-10-26 18:59:18,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 18:59:18,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:18,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 18:59:18,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-26 18:59:18,293 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 20 states. [2020-10-26 18:59:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:20,074 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2020-10-26 18:59:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 18:59:20,075 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-26 18:59:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:20,076 INFO L225 Difference]: With dead ends: 95 [2020-10-26 18:59:20,077 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 18:59:20,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 18:59:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 18:59:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2020-10-26 18:59:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 18:59:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-10-26 18:59:20,096 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 46 [2020-10-26 18:59:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:20,096 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-10-26 18:59:20,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 18:59:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-10-26 18:59:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 18:59:20,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:20,097 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:20,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 18:59:20,098 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:20,098 INFO L82 PathProgramCache]: Analyzing trace with hash -922969898, now seen corresponding path program 9 times [2020-10-26 18:59:20,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:20,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150157835] [2020-10-26 18:59:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:20,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:20,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:20,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:22,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:22,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:24,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:25,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 18:59:25,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 18:59:25,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 18:59:25,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:25,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 18:59:25,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:25,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 18:59:25,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:25,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:25,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:25,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:25,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:25,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:25,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:25,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:25,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:25,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:25,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:25,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 18:59:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:25,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:25,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:25,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:25,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:59:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:59:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:25,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 18:59:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:25,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:25,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:25,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:25,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:25,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:25,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:25,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:25,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:25,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 18:59:25,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150157835] [2020-10-26 18:59:25,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:25,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 18:59:25,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028560590] [2020-10-26 18:59:25,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 18:59:25,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:25,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 18:59:25,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-26 18:59:25,673 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 22 states. [2020-10-26 18:59:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:26,767 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-26 18:59:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 18:59:26,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-26 18:59:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:26,772 INFO L225 Difference]: With dead ends: 91 [2020-10-26 18:59:26,772 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 18:59:26,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 18:59:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 18:59:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2020-10-26 18:59:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 18:59:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-10-26 18:59:26,788 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 49 [2020-10-26 18:59:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:26,788 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-10-26 18:59:26,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 18:59:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-10-26 18:59:26,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 18:59:26,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:26,789 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:26,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 18:59:26,790 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1450874780, now seen corresponding path program 10 times [2020-10-26 18:59:26,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:26,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630055161] [2020-10-26 18:59:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:26,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:26,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 18:59:26,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-26 18:59:26,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 18:59:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 18:59:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:27,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:27,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:27,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:27,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:27,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:27,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:27,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:27,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:27,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 18:59:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:27,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:27,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:27,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:27,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:27,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:27,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:27,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:27,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:27,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 18:59:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:27,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:27,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:27,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:27,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:27,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:27,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:27,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:27,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:59:27,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 18:59:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:27,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:27,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:27,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:27,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:27,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:27,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:27,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:59:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 18:59:27,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630055161] [2020-10-26 18:59:27,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:27,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 18:59:27,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429205499] [2020-10-26 18:59:27,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 18:59:27,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 18:59:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-26 18:59:27,180 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 12 states. [2020-10-26 18:59:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:27,486 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-10-26 18:59:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 18:59:27,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-26 18:59:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:27,488 INFO L225 Difference]: With dead ends: 85 [2020-10-26 18:59:27,488 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 18:59:27,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 18:59:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 18:59:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-26 18:59:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 18:59:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-26 18:59:27,503 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 51 [2020-10-26 18:59:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:27,503 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-26 18:59:27,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 18:59:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-26 18:59:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 18:59:27,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:27,504 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:27,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 18:59:27,505 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1541891895, now seen corresponding path program 11 times [2020-10-26 18:59:27,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:27,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627931643] [2020-10-26 18:59:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:32,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:32,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 18:59:32,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:32,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 18:59:32,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:32,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 18:59:32,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:32,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 18:59:32,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:33,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:33,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:59:33,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:33,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 18:59:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:33,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:33,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:33,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:33,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:33,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 18:59:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:33,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:33,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:33,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:59:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:59:33,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 18:59:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:33,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:33,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:33,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:33,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:33,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:33,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 18:59:33,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627931643] [2020-10-26 18:59:33,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:33,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 18:59:33,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399421318] [2020-10-26 18:59:33,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 18:59:33,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:33,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 18:59:33,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-26 18:59:33,162 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 22 states. [2020-10-26 18:59:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:34,455 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-10-26 18:59:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 18:59:34,455 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-26 18:59:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:34,457 INFO L225 Difference]: With dead ends: 84 [2020-10-26 18:59:34,457 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 18:59:34,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 18:59:34,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 18:59:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2020-10-26 18:59:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 18:59:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2020-10-26 18:59:34,477 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 54 [2020-10-26 18:59:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:34,477 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2020-10-26 18:59:34,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 18:59:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2020-10-26 18:59:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 18:59:34,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:34,479 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:34,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 18:59:34,480 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:34,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1386566212, now seen corresponding path program 12 times [2020-10-26 18:59:34,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:34,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502024014] [2020-10-26 18:59:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:34,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:34,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:34,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:34,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:35,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:36,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:36,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:36,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:36,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:37,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:38,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:39,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:39,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 18:59:39,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 18:59:39,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 18:59:39,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:39,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 18:59:39,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 18:59:39,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:40,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:40,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:40,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:40,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:40,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:40,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:40,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:40,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:59:40,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 18:59:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:40,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:40,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:40,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:40,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:40,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:40,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:40,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:40,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 18:59:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:40,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:40,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:40,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:40,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:40,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:59:40,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:40,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:59:40,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:40,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:59:40,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:59:40,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 18:59:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:40,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:40,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:40,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:40,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:40,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 18:59:40,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502024014] [2020-10-26 18:59:40,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:40,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 18:59:40,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485643311] [2020-10-26 18:59:40,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 18:59:40,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 18:59:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-26 18:59:40,286 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 23 states. [2020-10-26 18:59:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:42,121 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2020-10-26 18:59:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 18:59:42,122 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-26 18:59:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:42,124 INFO L225 Difference]: With dead ends: 108 [2020-10-26 18:59:42,124 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 18:59:42,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 18:59:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 18:59:42,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2020-10-26 18:59:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 18:59:42,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-10-26 18:59:42,144 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 57 [2020-10-26 18:59:42,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:42,145 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-10-26 18:59:42,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 18:59:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-10-26 18:59:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 18:59:42,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:42,146 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:42,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 18:59:42,146 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:42,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:42,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1788334755, now seen corresponding path program 2 times [2020-10-26 18:59:42,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:42,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255310274] [2020-10-26 18:59:42,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:42,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:45,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:45,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:45,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:45,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:45,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:47,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:47,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 18:59:47,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 18:59:47,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 18:59:47,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:47,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 18:59:47,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:47,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 18:59:47,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:47,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:47,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:47,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:47,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:47,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:47,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:47,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:47,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:47,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:47,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:47,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 18:59:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:47,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:47,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:47,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:47,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:47,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:47,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:47,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:47,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:47,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:47,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:47,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 18:59:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:47,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:47,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:47,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:47,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:47,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:47,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:47,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:47,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 18:59:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:47,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:47,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:47,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:47,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:47,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 18:59:47,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:47,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:47,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:47,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:47,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 18:59:47,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255310274] [2020-10-26 18:59:47,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:47,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 18:59:47,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727599167] [2020-10-26 18:59:47,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 18:59:47,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:47,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 18:59:47,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-26 18:59:47,364 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 12 states. [2020-10-26 18:59:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:47,758 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2020-10-26 18:59:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 18:59:47,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-26 18:59:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:47,760 INFO L225 Difference]: With dead ends: 146 [2020-10-26 18:59:47,761 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 18:59:47,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-26 18:59:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 18:59:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 85. [2020-10-26 18:59:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 18:59:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-10-26 18:59:47,792 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 59 [2020-10-26 18:59:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:47,792 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-10-26 18:59:47,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 18:59:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-10-26 18:59:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 18:59:47,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:47,794 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:47,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 18:59:47,794 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash 588651799, now seen corresponding path program 13 times [2020-10-26 18:59:47,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:47,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498688210] [2020-10-26 18:59:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:47,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:47,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:48,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:48,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:48,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:48,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:49,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:52,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:52,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:52,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:52,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 18:59:52,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-26 18:59:52,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 18:59:52,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 18:59:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 18:59:52,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:53,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:53,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:53,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:53,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:53,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:53,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:53,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:53,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:53,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:53,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:53,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:53,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 18:59:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:53,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:53,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:53,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:53,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:53,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:53,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:53,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:53,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:53,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 18:59:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:53,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:53,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:53,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:53,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:53,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:59:53,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:59:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:59:53,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:53,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 18:59:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:53,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:53,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:53,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:53,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:53,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:53,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:53,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:53,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:53,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:53,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 99 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 18:59:53,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498688210] [2020-10-26 18:59:53,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:53,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 18:59:53,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816391503] [2020-10-26 18:59:53,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 18:59:53,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:53,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 18:59:53,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-10-26 18:59:53,861 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 26 states. [2020-10-26 18:59:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:58,088 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2020-10-26 18:59:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 18:59:58,089 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-26 18:59:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:58,090 INFO L225 Difference]: With dead ends: 137 [2020-10-26 18:59:58,091 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 18:59:58,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=418, Invalid=3742, Unknown=0, NotChecked=0, Total=4160 [2020-10-26 18:59:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 18:59:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 79. [2020-10-26 18:59:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 18:59:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-10-26 18:59:58,115 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 60 [2020-10-26 18:59:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:58,116 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-10-26 18:59:58,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 18:59:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-10-26 18:59:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 18:59:58,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:58,117 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:58,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 18:59:58,117 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:58,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:58,118 INFO L82 PathProgramCache]: Analyzing trace with hash -175797475, now seen corresponding path program 14 times [2020-10-26 18:59:58,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:58,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845843164] [2020-10-26 18:59:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:58,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 18:59:58,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:58,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-26 18:59:58,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 18:59:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 18:59:58,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:58,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:58,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:58,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:58,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:58,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:58,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:58,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:58,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:58,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:58,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 18:59:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:58,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:58,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:58,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:58,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:58,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:58,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:58,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:58,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 18:59:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:58,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:58,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:58,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:58,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:58,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:58,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:58,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:58,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:58,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 18:59:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:58,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:58,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:58,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:58,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:58,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:58,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:58,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 18:59:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:58,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:58,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:58,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:58,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:58,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 18:59:58,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845843164] [2020-10-26 18:59:58,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:58,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 18:59:58,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021838606] [2020-10-26 18:59:58,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 18:59:58,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:58,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 18:59:58,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-26 18:59:58,544 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 14 states. [2020-10-26 18:59:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:58,884 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-26 18:59:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 18:59:58,886 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-26 18:59:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:58,888 INFO L225 Difference]: With dead ends: 108 [2020-10-26 18:59:58,888 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 18:59:58,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-26 18:59:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 18:59:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-26 18:59:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 18:59:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-26 18:59:58,905 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 62 [2020-10-26 18:59:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:58,905 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-26 18:59:58,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 18:59:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-26 18:59:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 18:59:58,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:58,906 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:58,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 18:59:58,906 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:58,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1597298494, now seen corresponding path program 3 times [2020-10-26 18:59:58,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:58,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283076423] [2020-10-26 18:59:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:59,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:59,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:59,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:59,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:01,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:02,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:02,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:02,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:03,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:03,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:04,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:04,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:04,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:00:04,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:04,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:04,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:00:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:04,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:04,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:04,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:04,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:04,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:04,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:04,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:04,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:00:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:04,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:04,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:04,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:04,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:04,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:04,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:00:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:04,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:04,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:04,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:04,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:04,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:04,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:04,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:04,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:00:04,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283076423] [2020-10-26 19:00:04,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:04,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:00:04,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550474643] [2020-10-26 19:00:04,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:00:04,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:04,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:00:04,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:00:04,128 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 13 states. [2020-10-26 19:00:04,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:04,555 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2020-10-26 19:00:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:00:04,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-26 19:00:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:04,557 INFO L225 Difference]: With dead ends: 149 [2020-10-26 19:00:04,557 INFO L226 Difference]: Without dead ends: 121 [2020-10-26 19:00:04,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:00:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-26 19:00:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 81. [2020-10-26 19:00:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:00:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-10-26 19:00:04,579 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 62 [2020-10-26 19:00:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:04,579 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-10-26 19:00:04,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:00:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-10-26 19:00:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:00:04,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:04,580 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:04,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:00:04,580 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:04,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1038504996, now seen corresponding path program 15 times [2020-10-26 19:00:04,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:04,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234832873] [2020-10-26 19:00:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:06,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:06,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:06,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:06,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:09,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:09,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:09,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:00:09,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:00:09,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:00:09,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:09,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:00:09,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:09,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:00:09,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:11,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:11,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:11,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:11,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:11,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:00:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:11,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:11,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:00:11,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:11,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:11,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:11,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:00:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:11,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:11,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:00:11,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:11,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:00:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:11,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:11,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:11,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:11,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:11,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 4 proven. 126 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:00:11,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234832873] [2020-10-26 19:00:11,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:11,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:00:11,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519435683] [2020-10-26 19:00:11,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:00:11,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:11,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:00:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=749, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:00:11,145 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 29 states. [2020-10-26 19:00:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:15,287 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2020-10-26 19:00:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:00:15,288 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-26 19:00:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:15,290 INFO L225 Difference]: With dead ends: 113 [2020-10-26 19:00:15,290 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:00:15,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:00:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:00:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2020-10-26 19:00:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:00:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-10-26 19:00:15,321 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 63 [2020-10-26 19:00:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:15,322 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-10-26 19:00:15,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:00:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-10-26 19:00:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:00:15,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:15,323 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:15,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:00:15,323 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:15,324 INFO L82 PathProgramCache]: Analyzing trace with hash -505381726, now seen corresponding path program 16 times [2020-10-26 19:00:15,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:15,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415185199] [2020-10-26 19:00:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:15,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:15,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:15,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:15,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:15,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:20,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:00:20,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:00:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:00:20,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:00:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:00:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:20,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:20,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:20,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:20,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:20,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:20,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:20,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:20,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:20,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:20,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:20,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:00:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:20,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:20,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:20,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:20,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:20,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:20,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:20,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:20,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:20,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:20,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:00:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:20,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:20,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:20,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:20,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:20,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:20,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:20,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:20,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:20,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:20,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:00:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:20,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:20,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:20,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:20,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:20,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:20,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:00:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:20,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:20,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:20,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:20,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:20,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:00:20,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:20,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:20,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:20,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:20,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:00:20,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415185199] [2020-10-26 19:00:20,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:20,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:00:20,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976669063] [2020-10-26 19:00:20,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:00:20,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:20,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:00:20,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:00:20,998 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 23 states. [2020-10-26 19:00:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:22,759 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2020-10-26 19:00:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:00:22,760 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-10-26 19:00:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:22,761 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:00:22,762 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:00:22,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:00:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:00:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-10-26 19:00:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:00:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2020-10-26 19:00:22,804 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 65 [2020-10-26 19:00:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:22,805 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2020-10-26 19:00:22,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:00:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2020-10-26 19:00:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:00:22,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:22,806 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:22,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:00:22,806 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash -854564611, now seen corresponding path program 17 times [2020-10-26 19:00:22,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:22,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957032285] [2020-10-26 19:00:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:22,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:23,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:23,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:23,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:23,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:27,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:27,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:00:27,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:00:27,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:00:27,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:00:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:27,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 19:00:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:29,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:29,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:29,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:29,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:29,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:29,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:29,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:29,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:29,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:00:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:29,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:29,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:29,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:29,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:29,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:29,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:29,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:29,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:29,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:29,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:29,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:00:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:29,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:29,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:29,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:29,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:29,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:00:29,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:29,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:29,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:29,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:00:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:29,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:29,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:29,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:29,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:29,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:29,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:29,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:29,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:00:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:29,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:29,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:29,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:29,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:29,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:29,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:29,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 10 proven. 116 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:00:29,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957032285] [2020-10-26 19:00:29,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:29,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:00:29,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315672522] [2020-10-26 19:00:29,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:00:29,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:29,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:00:29,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:00:29,446 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 26 states. [2020-10-26 19:00:30,521 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-26 19:00:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:33,106 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2020-10-26 19:00:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:00:33,106 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-10-26 19:00:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:33,108 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:00:33,108 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:00:33,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=263, Invalid=2817, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 19:00:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:00:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2020-10-26 19:00:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:00:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2020-10-26 19:00:33,149 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 68 [2020-10-26 19:00:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:33,149 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2020-10-26 19:00:33,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:00:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2020-10-26 19:00:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:00:33,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:33,150 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:33,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:00:33,151 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash -951100734, now seen corresponding path program 18 times [2020-10-26 19:00:33,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:33,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443576584] [2020-10-26 19:00:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:33,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:33,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:33,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:33,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:38,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:38,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:00:38,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:00:38,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:00:38,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:38,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:00:38,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:38,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:00:38,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:39,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:39,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:39,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:39,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:39,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:00:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:39,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:39,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:39,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:39,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:00:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:39,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:00:39,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:39,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:00:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:39,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:00:39,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:39,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:00:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:39,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:39,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:39,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:39,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:39,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 10 proven. 139 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:00:39,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443576584] [2020-10-26 19:00:39,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:39,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:00:39,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196835415] [2020-10-26 19:00:39,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:00:39,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:00:39,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:00:39,897 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand 29 states. [2020-10-26 19:00:41,897 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-26 19:00:42,123 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-26 19:00:46,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:46,293 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-10-26 19:00:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-26 19:00:46,293 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 71 [2020-10-26 19:00:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:46,295 INFO L225 Difference]: With dead ends: 157 [2020-10-26 19:00:46,295 INFO L226 Difference]: Without dead ends: 154 [2020-10-26 19:00:46,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=403, Invalid=4853, Unknown=0, NotChecked=0, Total=5256 [2020-10-26 19:00:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-26 19:00:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 116. [2020-10-26 19:00:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:00:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2020-10-26 19:00:46,353 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 71 [2020-10-26 19:00:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:46,353 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2020-10-26 19:00:46,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:00:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2020-10-26 19:00:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:00:46,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:46,359 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:46,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:00:46,359 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:46,360 INFO L82 PathProgramCache]: Analyzing trace with hash 137627016, now seen corresponding path program 19 times [2020-10-26 19:00:46,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:46,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108750719] [2020-10-26 19:00:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:46,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:46,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:00:46,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:46,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-26 19:00:46,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:00:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 19:00:46,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:46,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:46,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:46,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:46,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:46,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:46,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:46,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:46,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:00:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:46,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:46,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:46,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:46,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:46,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:46,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:46,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:46,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:00:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:46,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:46,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:46,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:46,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:46,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:46,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:46,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:46,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:46,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:00:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:46,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:46,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:46,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:46,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:46,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:46,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:00:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:46,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:46,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:46,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:46,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:46,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:46,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:46,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:46,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:46,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:00:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:46,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:46,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:46,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:46,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:46,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:46,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:46,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:46,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:46,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:46,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 60 proven. 57 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-26 19:00:46,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108750719] [2020-10-26 19:00:46,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:46,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:00:46,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219911143] [2020-10-26 19:00:46,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:00:46,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:00:46,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:00:46,984 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand 16 states. [2020-10-26 19:00:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:47,439 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2020-10-26 19:00:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:00:47,440 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-26 19:00:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:47,442 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:00:47,442 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:00:47,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:00:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:00:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-26 19:00:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:00:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-10-26 19:00:47,470 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 73 [2020-10-26 19:00:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:47,470 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-10-26 19:00:47,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:00:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-10-26 19:00:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:00:47,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:47,471 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:47,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:00:47,472 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:47,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:47,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1062625111, now seen corresponding path program 4 times [2020-10-26 19:00:47,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:47,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136771112] [2020-10-26 19:00:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:47,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:47,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:47,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:48,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:52,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:00:52,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:00:52,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:00:52,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:00:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:52,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:00:52,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:52,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:52,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:52,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:52,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:52,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:00:52,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:52,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:52,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:52,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:52,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:52,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:00:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:52,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:52,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:52,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:52,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:52,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:52,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:52,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:52,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:52,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:52,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:00:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:52,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:52,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:52,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:52,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:52,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:52,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:52,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:52,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:52,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:00:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:52,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:52,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:52,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:52,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:52,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:52,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:52,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:52,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:00:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:52,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:52,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:52,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:52,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:52,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:52,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:52,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:52,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:52,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 8 proven. 117 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-26 19:00:52,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136771112] [2020-10-26 19:00:52,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:52,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:00:52,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377990955] [2020-10-26 19:00:52,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:00:52,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:52,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:00:52,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:00:52,736 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 14 states. [2020-10-26 19:00:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:53,345 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2020-10-26 19:00:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:00:53,346 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-26 19:00:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:53,347 INFO L225 Difference]: With dead ends: 172 [2020-10-26 19:00:53,347 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:00:53,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:00:53,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:00:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 95. [2020-10-26 19:00:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:00:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-10-26 19:00:53,375 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 73 [2020-10-26 19:00:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:53,376 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-10-26 19:00:53,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:00:53,376 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-10-26 19:00:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:00:53,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:53,376 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:53,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:00:53,377 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash 769347293, now seen corresponding path program 20 times [2020-10-26 19:00:53,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:53,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082272181] [2020-10-26 19:00:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:53,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:53,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:53,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:56,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:58,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:58,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:58,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:58,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:00:58,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:00:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:00:58,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:00:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 19:00:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:59,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:59,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:59,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:59,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:59,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:59,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:59,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:59,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:00:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:59,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:59,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:59,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:59,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:59,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:59,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:59,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:59,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:59,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:00:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:59,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:59,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:59,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:59,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:59,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:59,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:59,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:59,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:00:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:59,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:59,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:59,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:59,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:59,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:59,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:59,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:59,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:59,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:59,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:59,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:00:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:59,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:59,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:59,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:59,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:59,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:00:59,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:59,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:59,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:59,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:59,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:00:59,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082272181] [2020-10-26 19:00:59,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:59,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:00:59,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114759987] [2020-10-26 19:00:59,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:00:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:00:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:00:59,879 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 28 states. [2020-10-26 19:01:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:04,868 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2020-10-26 19:01:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:01:04,868 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2020-10-26 19:01:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:04,870 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:01:04,871 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:01:04,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=444, Invalid=2978, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:01:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:01:04,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-26 19:01:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:01:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-10-26 19:01:04,909 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 74 [2020-10-26 19:01:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:04,909 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-10-26 19:01:04,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:01:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-10-26 19:01:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:01:04,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:04,910 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:04,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:01:04,911 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:04,911 INFO L82 PathProgramCache]: Analyzing trace with hash -74227997, now seen corresponding path program 21 times [2020-10-26 19:01:04,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:04,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696186823] [2020-10-26 19:01:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:04,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:05,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:05,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:05,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:07,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:07,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:09,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:01:09,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:01:09,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:01:09,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:09,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:01:09,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:09,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 19:01:09,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:10,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:10,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:10,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:10,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:10,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:10,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:10,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:10,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:10,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:10,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:10,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:01:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:10,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:10,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:10,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:10,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:10,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:01:10,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:01:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:10,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:10,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:10,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:10,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:01:10,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:10,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:10,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:10,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:10,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:10,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:01:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:10,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:10,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:10,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:10,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:10,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:01:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:10,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:10,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:10,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:10,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:10,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:10,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:10,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:01:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:10,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:10,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:10,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:10,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:10,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:10,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:10,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:10,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 12 proven. 137 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-26 19:01:11,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696186823] [2020-10-26 19:01:11,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:11,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:01:11,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469695471] [2020-10-26 19:01:11,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:01:11,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:11,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:01:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:01:11,001 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 27 states. [2020-10-26 19:01:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:13,176 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2020-10-26 19:01:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:01:13,184 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2020-10-26 19:01:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:13,185 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:01:13,185 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:01:13,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:01:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:01:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2020-10-26 19:01:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:01:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-10-26 19:01:13,211 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 76 [2020-10-26 19:01:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:13,211 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-10-26 19:01:13,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:01:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-10-26 19:01:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:01:13,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:13,212 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:13,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:01:13,213 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2139962456, now seen corresponding path program 22 times [2020-10-26 19:01:13,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:13,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300884784] [2020-10-26 19:01:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:13,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:13,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:13,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:13,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:14,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:14,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:16,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:17,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:18,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:18,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:01:18,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:01:18,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:01:18,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:18,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:01:18,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:18,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:01:18,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:19,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:19,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:19,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:19,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:19,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:19,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:19,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:19,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:01:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:19,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:19,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:19,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:19,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:19,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:19,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:19,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:19,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:01:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:19,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:19,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:19,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:01:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:19,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:19,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:19,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:01:19,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:19,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:19,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:01:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:19,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:19,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:19,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:19,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:19,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:01:19,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:19,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:19,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:19,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:19,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:20,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:01:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:20,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:20,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:20,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:20,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:20,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:20,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:20,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:20,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:20,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 159 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:01:20,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300884784] [2020-10-26 19:01:20,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:20,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:01:20,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761183722] [2020-10-26 19:01:20,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:01:20,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:20,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:01:20,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:01:20,044 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 30 states. [2020-10-26 19:01:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:24,241 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2020-10-26 19:01:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:01:24,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 79 [2020-10-26 19:01:24,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:24,245 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:01:24,245 INFO L226 Difference]: Without dead ends: 139 [2020-10-26 19:01:24,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=266, Invalid=3274, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:01:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-26 19:01:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-10-26 19:01:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:01:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-10-26 19:01:24,280 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 79 [2020-10-26 19:01:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:24,280 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-10-26 19:01:24,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:01:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-10-26 19:01:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:01:24,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:24,282 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:24,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:01:24,282 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash 151153859, now seen corresponding path program 23 times [2020-10-26 19:01:24,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:24,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757311187] [2020-10-26 19:01:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:24,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:24,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:24,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:24,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:24,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:26,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:27,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:27,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:28,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:28,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:28,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:29,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:01:29,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:01:29,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:01:29,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:01:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-26 19:01:29,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:30,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:30,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:30,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:30,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:30,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:30,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:30,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:30,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:30,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:30,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:01:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:30,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:30,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:30,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:30,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:01:30,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:30,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:30,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:30,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:30,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:30,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:01:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:30,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:30,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:30,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:30,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:30,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:30,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:30,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:30,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:30,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:30,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:01:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:30,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:30,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:30,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:30,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:01:30,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:30,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:30,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:30,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:30,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:30,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:01:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:30,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:30,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:30,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:30,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:01:30,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:30,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:30,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:30,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:30,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:01:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:30,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:30,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:30,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:30,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:30,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:30,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 15 proven. 183 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-26 19:01:30,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757311187] [2020-10-26 19:01:30,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:30,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:01:30,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353385504] [2020-10-26 19:01:30,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:01:30,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:01:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:01:30,890 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 30 states. [2020-10-26 19:01:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:36,362 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2020-10-26 19:01:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:01:36,364 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 82 [2020-10-26 19:01:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:36,366 INFO L225 Difference]: With dead ends: 172 [2020-10-26 19:01:36,366 INFO L226 Difference]: Without dead ends: 169 [2020-10-26 19:01:36,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=334, Invalid=3698, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:01:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-26 19:01:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 100. [2020-10-26 19:01:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:01:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2020-10-26 19:01:36,411 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 82 [2020-10-26 19:01:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:36,411 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2020-10-26 19:01:36,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:01:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2020-10-26 19:01:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:01:36,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:36,413 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:36,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:01:36,413 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:36,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:36,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1598363337, now seen corresponding path program 24 times [2020-10-26 19:01:36,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:36,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659742728] [2020-10-26 19:01:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:36,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:36,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:01:36,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-26 19:01:36,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:36,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:01:36,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:36,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:01:36,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:37,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:37,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:37,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:37,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:37,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:37,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:01:37,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:37,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:37,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:01:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:37,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:37,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:37,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:37,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:37,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:37,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:37,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:37,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:37,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:37,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:37,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:01:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:37,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:37,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:37,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:37,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:37,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:37,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:37,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:37,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:01:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:37,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:37,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:37,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:37,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:37,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:37,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:37,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:37,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:01:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:37,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:37,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:37,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:37,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:37,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:37,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:37,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:37,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:37,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:37,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:37,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:01:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:37,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:37,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:37,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:37,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:37,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:37,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:37,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:37,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:37,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:37,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:37,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:01:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:37,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:37,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:37,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:37,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:37,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:37,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:37,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:37,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:37,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:37,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 84 proven. 77 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-26 19:01:37,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659742728] [2020-10-26 19:01:37,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:37,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:01:37,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085701938] [2020-10-26 19:01:37,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:01:37,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:01:37,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:01:37,332 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand 18 states. [2020-10-26 19:01:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:37,982 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-26 19:01:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:01:37,984 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2020-10-26 19:01:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:37,985 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:01:37,985 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:01:37,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:01:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:01:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-26 19:01:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:01:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-10-26 19:01:38,010 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 84 [2020-10-26 19:01:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:38,011 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-10-26 19:01:38,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:01:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-10-26 19:01:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:01:38,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:38,012 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:38,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:01:38,012 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1589772522, now seen corresponding path program 5 times [2020-10-26 19:01:38,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:38,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453676429] [2020-10-26 19:01:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:38,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:41,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:41,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:43,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:43,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:01:43,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:01:43,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:01:43,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:01:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:43,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:01:43,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:43,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:43,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:43,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:43,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:43,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:43,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:01:43,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:43,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:43,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:43,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:43,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:43,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:01:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:43,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:43,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:43,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:43,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:43,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:43,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:43,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:43,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:43,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:43,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:43,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:01:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:43,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:43,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:43,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:43,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:43,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:43,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:43,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:43,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:43,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:01:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:43,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:43,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:43,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:43,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:43,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:43,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:43,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:43,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:43,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:43,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:43,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:01:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:43,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:43,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:43,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:43,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:43,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:43,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:43,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:43,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:43,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:43,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:43,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:01:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:43,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:43,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:43,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:43,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:43,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:43,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:43,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:43,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:43,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:43,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-26 19:01:43,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453676429] [2020-10-26 19:01:43,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:43,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:01:43,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510038171] [2020-10-26 19:01:43,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:01:43,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:43,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:01:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:01:43,361 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 15 states. [2020-10-26 19:01:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:44,111 INFO L93 Difference]: Finished difference Result 191 states and 225 transitions. [2020-10-26 19:01:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:01:44,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-10-26 19:01:44,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:44,113 INFO L225 Difference]: With dead ends: 191 [2020-10-26 19:01:44,113 INFO L226 Difference]: Without dead ends: 155 [2020-10-26 19:01:44,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:01:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-26 19:01:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 83. [2020-10-26 19:01:44,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:01:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-26 19:01:44,147 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 84 [2020-10-26 19:01:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:44,147 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-26 19:01:44,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:01:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-26 19:01:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:01:44,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:44,148 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:44,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:01:44,149 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash -822974008, now seen corresponding path program 25 times [2020-10-26 19:01:44,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:44,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412610296] [2020-10-26 19:01:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:44,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:46,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:47,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:49,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:49,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:01:49,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:01:49,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:01:49,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:01:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:01:49,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:50,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:50,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:50,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:50,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:50,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:50,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:50,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:50,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:50,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:50,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:50,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:01:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:50,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:50,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:50,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:50,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:50,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:50,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:50,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:50,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:50,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:50,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:01:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:50,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:50,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:50,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:50,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:50,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:50,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:50,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:50,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:50,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:50,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:01:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:50,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:50,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:50,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:50,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:50,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:50,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:50,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:01:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:50,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:50,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:50,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:50,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:50,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:50,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:50,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:50,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:50,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:50,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-26 19:01:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:50,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:50,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:50,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:50,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 13 proven. 202 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-26 19:01:50,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412610296] [2020-10-26 19:01:50,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:50,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:01:50,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261524343] [2020-10-26 19:01:50,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:01:50,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:01:50,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:01:50,526 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 31 states. [2020-10-26 19:01:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:53,243 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2020-10-26 19:01:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:01:53,244 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-10-26 19:01:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:53,246 INFO L225 Difference]: With dead ends: 143 [2020-10-26 19:01:53,246 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:01:53,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=184, Invalid=1708, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:01:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:01:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2020-10-26 19:01:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:01:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-10-26 19:01:53,303 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 85 [2020-10-26 19:01:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:53,304 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-10-26 19:01:53,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:01:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-10-26 19:01:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:01:53,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:53,305 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:53,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:01:53,305 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:53,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:53,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1764353678, now seen corresponding path program 26 times [2020-10-26 19:01:53,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:53,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940839046] [2020-10-26 19:01:53,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:53,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:53,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:53,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:53,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:53,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:58,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:58,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:01:58,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:01:58,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:01:58,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:01:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:58,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:01:58,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:59,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:59,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:59,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:59,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:59,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:01:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:59,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:59,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:59,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:59,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:59,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:59,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:59,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:59,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:59,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:01:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:59,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:59,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:59,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:59,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:01:59,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:59,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:59,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:59,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:59,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:01:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:59,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:59,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:59,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:59,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:01:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:59,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:59,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:59,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:59,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:59,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:59,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:59,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:59,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:59,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:01:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:59,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:59,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:59,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:59,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:59,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:59,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:59,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:59,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:59,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:01:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:59,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:59,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:59,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:59,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:59,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:59,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 14 proven. 185 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:01:59,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940839046] [2020-10-26 19:01:59,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:59,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:01:59,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243558686] [2020-10-26 19:01:59,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:01:59,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:59,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:01:59,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=807, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:01:59,699 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 30 states. [2020-10-26 19:02:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:02,693 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2020-10-26 19:02:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:02:02,693 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-10-26 19:02:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:02,695 INFO L225 Difference]: With dead ends: 145 [2020-10-26 19:02:02,695 INFO L226 Difference]: Without dead ends: 142 [2020-10-26 19:02:02,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=175, Invalid=2275, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:02:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-26 19:02:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 114. [2020-10-26 19:02:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:02:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2020-10-26 19:02:02,737 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 87 [2020-10-26 19:02:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:02,738 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2020-10-26 19:02:02,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:02:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2020-10-26 19:02:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:02:02,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:02,739 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:02,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:02:02,739 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1019722583, now seen corresponding path program 27 times [2020-10-26 19:02:02,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:02,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534198370] [2020-10-26 19:02:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:02,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:02,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:02,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:03,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:03,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:03,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:04,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:05,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:05,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:05,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:07,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:07,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:02:07,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:02:07,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:02:07,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:07,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:02:07,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:07,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-26 19:02:07,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:08,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:08,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:08,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:08,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:08,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:08,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:02:08,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:08,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:08,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:08,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:08,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:08,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:02:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:02:09,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:09,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:09,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:09,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:02:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:09,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:09,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:09,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:02:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:09,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:09,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:09,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:02:09,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:02:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:02:09,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:09,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:09,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:09,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:02:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:09,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:09,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:09,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:09,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:02:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:09,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:09,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 17 proven. 208 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:02:09,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534198370] [2020-10-26 19:02:09,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:09,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:02:09,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394267270] [2020-10-26 19:02:09,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:02:09,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:02:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=923, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:02:09,194 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand 32 states.