/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:59:17,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:59:17,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:59:17,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:59:17,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:59:17,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:59:17,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:59:17,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:59:17,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:59:17,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:59:17,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:59:17,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:59:17,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:59:17,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:59:17,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:59:17,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:59:17,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:59:17,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:59:17,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:59:17,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:59:17,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:59:17,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:59:17,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:59:17,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:59:17,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:59:17,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:59:17,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:59:17,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:59:17,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:59:17,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:59:17,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:59:17,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:59:17,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:59:17,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:59:17,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:59:17,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:59:17,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:59:17,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:59:17,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:59:17,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:59:17,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:59:17,386 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 03:59:17,437 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:59:17,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:59:17,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:59:17,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:59:17,441 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:59:17,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:59:17,441 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:59:17,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:59:17,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:59:17,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:59:17,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:59:17,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:59:17,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:59:17,443 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:59:17,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:59:17,443 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:59:17,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:59:17,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:59:17,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:59:17,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:59:17,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:59:17,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:59:17,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:59:17,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:59:17,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:59:17,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:59:17,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:59:17,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:59:17,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:59:17,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:59:17,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:59:17,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:59:17,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:59:17,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:59:17,963 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:59:17,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2020-10-29 03:59:18,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c196191f/203372ba0c8d4ee991bb2ccd75598489/FLAG2847ddbac [2020-10-29 03:59:18,782 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:59:18,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2020-10-29 03:59:18,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c196191f/203372ba0c8d4ee991bb2ccd75598489/FLAG2847ddbac [2020-10-29 03:59:19,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c196191f/203372ba0c8d4ee991bb2ccd75598489 [2020-10-29 03:59:19,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:59:19,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:59:19,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:59:19,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:59:19,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:59:19,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:59:19" (1/1) ... [2020-10-29 03:59:19,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613cb519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19, skipping insertion in model container [2020-10-29 03:59:19,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:59:19" (1/1) ... [2020-10-29 03:59:19,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:59:19,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:59:19,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:59:19,387 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:59:19,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:59:19,430 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:59:19,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19 WrapperNode [2020-10-29 03:59:19,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:59:19,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:59:19,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:59:19,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:59:19,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19" (1/1) ... [2020-10-29 03:59:19,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19" (1/1) ... [2020-10-29 03:59:19,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19" (1/1) ... [2020-10-29 03:59:19,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19" (1/1) ... [2020-10-29 03:59:19,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19" (1/1) ... [2020-10-29 03:59:19,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19" (1/1) ... [2020-10-29 03:59:19,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19" (1/1) ... [2020-10-29 03:59:19,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:59:19,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:59:19,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:59:19,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:59:19,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:59:19,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:59:19,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:59:19,559 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:59:19,559 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:59:19,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:59:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:59:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:59:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:59:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 03:59:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 03:59:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:59:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:59:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:59:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:59:19,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:59:19,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:59:19,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:59:19,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:59:19,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 03:59:19,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 03:59:19,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:59:19,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:59:19,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:59:19,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:59:20,142 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:59:20,142 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 03:59:20,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:59:20 BoogieIcfgContainer [2020-10-29 03:59:20,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:59:20,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:59:20,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:59:20,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:59:20,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:59:19" (1/3) ... [2020-10-29 03:59:20,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9573dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:59:20, skipping insertion in model container [2020-10-29 03:59:20,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:59:19" (2/3) ... [2020-10-29 03:59:20,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9573dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:59:20, skipping insertion in model container [2020-10-29 03:59:20,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:59:20" (3/3) ... [2020-10-29 03:59:20,158 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2020-10-29 03:59:20,203 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:59:20,209 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:59:20,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:59:20,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:59:20,263 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:59:20,263 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:59:20,263 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:59:20,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:59:20,264 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:59:20,264 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:59:20,264 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:59:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-29 03:59:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 03:59:20,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:20,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:20,292 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash 33759211, now seen corresponding path program 1 times [2020-10-29 03:59:20,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:20,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706913328] [2020-10-29 03:59:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:20,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:20,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 03:59:20,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:20,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-29 03:59:20,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:20,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:59:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:59:20,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:20,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:20,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:20,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:20,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:20,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 03:59:20,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:20,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:20,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:20,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:20,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:20,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:59:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:20,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706913328] [2020-10-29 03:59:20,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:59:20,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 03:59:20,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833833487] [2020-10-29 03:59:20,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 03:59:20,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:20,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 03:59:20,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:59:20,858 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-29 03:59:20,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:20,996 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-10-29 03:59:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 03:59:20,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-29 03:59:20,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:21,007 INFO L225 Difference]: With dead ends: 58 [2020-10-29 03:59:21,008 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 03:59:21,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:59:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 03:59:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-10-29 03:59:21,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 03:59:21,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-29 03:59:21,062 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-29 03:59:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:21,062 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-29 03:59:21,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 03:59:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-29 03:59:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 03:59:21,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:21,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:21,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:59:21,066 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:21,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1706532520, now seen corresponding path program 1 times [2020-10-29 03:59:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:21,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708610997] [2020-10-29 03:59:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:21,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:21,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:21,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 03:59:21,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:21,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-29 03:59:21,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:21,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:59:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:21,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:21,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:21,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:21,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:21,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:21,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:21,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:59:21,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:21,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:21,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:59:21,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:21,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:59:21,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:21,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708610997] [2020-10-29 03:59:21,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:59:21,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 03:59:21,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600804047] [2020-10-29 03:59:21,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 03:59:21,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 03:59:21,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:59:21,383 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-29 03:59:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:21,574 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-29 03:59:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 03:59:21,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-29 03:59:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:21,576 INFO L225 Difference]: With dead ends: 47 [2020-10-29 03:59:21,577 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 03:59:21,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:59:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 03:59:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-10-29 03:59:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 03:59:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-29 03:59:21,592 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-10-29 03:59:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:21,592 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-29 03:59:21,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 03:59:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-29 03:59:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 03:59:21,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:21,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:21,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:59:21,595 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1514368637, now seen corresponding path program 1 times [2020-10-29 03:59:21,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:21,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817397884] [2020-10-29 03:59:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:21,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:21,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:22,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:23,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:23,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 03:59:23,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:59:23,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1434 [2020-10-29 03:59:23,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:23,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:23,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:59:23,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:23,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:59:23,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:23,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:23,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:23,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:23,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:23,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:23,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 03:59:23,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:23,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:23,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:23,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:23,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:23,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817397884] [2020-10-29 03:59:23,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:23,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:59:23,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224850615] [2020-10-29 03:59:23,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:59:23,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:59:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:59:23,551 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 13 states. [2020-10-29 03:59:24,215 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-29 03:59:24,657 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-29 03:59:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:24,955 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-29 03:59:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:59:24,959 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-29 03:59:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:24,961 INFO L225 Difference]: With dead ends: 64 [2020-10-29 03:59:24,961 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 03:59:24,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:59:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 03:59:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2020-10-29 03:59:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 03:59:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-29 03:59:24,975 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 20 [2020-10-29 03:59:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:24,975 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-29 03:59:24,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:59:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-29 03:59:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 03:59:24,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:24,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:24,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:59:24,977 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:24,978 INFO L82 PathProgramCache]: Analyzing trace with hash 927562623, now seen corresponding path program 1 times [2020-10-29 03:59:24,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:24,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240013486] [2020-10-29 03:59:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:25,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:25,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:25,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:25,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 03:59:25,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:25,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-29 03:59:25,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:25,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:25,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:59:25,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:25,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 03:59:25,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:25,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:25,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:25,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:25,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:25,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:25,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 03:59:25,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:25,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:25,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:25,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:25,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:25,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 03:59:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:25,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240013486] [2020-10-29 03:59:25,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:25,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 03:59:25,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674060901] [2020-10-29 03:59:25,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:59:25,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:59:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:59:25,793 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2020-10-29 03:59:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:26,429 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-29 03:59:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:59:26,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-29 03:59:26,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:26,434 INFO L225 Difference]: With dead ends: 75 [2020-10-29 03:59:26,435 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 03:59:26,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:59:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 03:59:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2020-10-29 03:59:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 03:59:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-29 03:59:26,448 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2020-10-29 03:59:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:26,449 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-29 03:59:26,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:59:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-29 03:59:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 03:59:26,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:26,450 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:26,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:59:26,451 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash 177894425, now seen corresponding path program 1 times [2020-10-29 03:59:26,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:26,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764662119] [2020-10-29 03:59:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:26,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:26,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:26,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:27,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:28,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:28,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 03:59:28,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:59:28,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2209 [2020-10-29 03:59:28,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:28,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:28,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:59:28,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:28,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 03:59:28,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:29,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:29,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:29,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:29,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:29,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 03:59:29,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:29,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:29,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:29,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:29,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764662119] [2020-10-29 03:59:29,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:29,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:59:29,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898167210] [2020-10-29 03:59:29,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:59:29,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:29,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:59:29,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:59:29,176 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 13 states. [2020-10-29 03:59:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:30,693 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-29 03:59:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:59:30,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-29 03:59:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:30,697 INFO L225 Difference]: With dead ends: 71 [2020-10-29 03:59:30,697 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 03:59:30,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:59:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 03:59:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-29 03:59:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 03:59:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-29 03:59:30,713 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 23 [2020-10-29 03:59:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:30,714 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-29 03:59:30,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:59:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-29 03:59:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 03:59:30,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:30,715 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:30,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:59:30,715 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash -843173929, now seen corresponding path program 1 times [2020-10-29 03:59:30,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:30,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086318787] [2020-10-29 03:59:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:30,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:30,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:30,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:31,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:31,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:31,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 03:59:31,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:59:31,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-29 03:59:31,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:31,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:59:31,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:31,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:59:31,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:59:32,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:32,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:32,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:32,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:32,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:32,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 03:59:32,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:32,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:32,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:32,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086318787] [2020-10-29 03:59:32,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:32,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:59:32,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121586301] [2020-10-29 03:59:32,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:59:32,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:32,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:59:32,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:59:32,475 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 13 states. [2020-10-29 03:59:33,281 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-29 03:59:33,470 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 03:59:33,829 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 03:59:34,001 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-29 03:59:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:34,114 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-10-29 03:59:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:59:34,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-29 03:59:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:34,121 INFO L225 Difference]: With dead ends: 69 [2020-10-29 03:59:34,121 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 03:59:34,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:59:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 03:59:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 03:59:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 03:59:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-29 03:59:34,147 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 23 [2020-10-29 03:59:34,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:34,147 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-29 03:59:34,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:59:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-29 03:59:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 03:59:34,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:34,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:34,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:59:34,150 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:34,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1576624418, now seen corresponding path program 2 times [2020-10-29 03:59:34,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:34,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201812401] [2020-10-29 03:59:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:34,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:35,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:35,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:59:35,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:59:35,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1749 [2020-10-29 03:59:35,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:35,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:35,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:59:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:35,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:59:35,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:36,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:36,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:36,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:36,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:36,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 03:59:36,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:36,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:36,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:36,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:36,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201812401] [2020-10-29 03:59:36,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:36,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:59:36,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363479893] [2020-10-29 03:59:36,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:59:36,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:59:36,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:59:36,382 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 16 states. [2020-10-29 03:59:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:37,684 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-10-29 03:59:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:59:37,685 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-29 03:59:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:37,686 INFO L225 Difference]: With dead ends: 103 [2020-10-29 03:59:37,686 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 03:59:37,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:59:37,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 03:59:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2020-10-29 03:59:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 03:59:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-29 03:59:37,705 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 24 [2020-10-29 03:59:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:37,705 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-29 03:59:37,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:59:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-29 03:59:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 03:59:37,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:37,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:37,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:59:37,707 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:37,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:37,708 INFO L82 PathProgramCache]: Analyzing trace with hash 989818404, now seen corresponding path program 1 times [2020-10-29 03:59:37,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:37,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484546845] [2020-10-29 03:59:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:37,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:37,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:38,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:38,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:40,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:40,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:59:40,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:59:40,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2303 [2020-10-29 03:59:40,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:40,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:59:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:40,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:59:40,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:40,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:40,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:40,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:40,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:40,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:40,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 03:59:40,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:40,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:40,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:40,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:40,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:40,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:40,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484546845] [2020-10-29 03:59:40,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:40,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:59:40,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632748343] [2020-10-29 03:59:40,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:59:40,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:40,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:59:40,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:59:40,645 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 16 states. [2020-10-29 03:59:42,241 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-29 03:59:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:43,197 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2020-10-29 03:59:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:59:43,198 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-29 03:59:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:43,200 INFO L225 Difference]: With dead ends: 107 [2020-10-29 03:59:43,201 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:59:43,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 03:59:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:59:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-29 03:59:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 03:59:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-29 03:59:43,219 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 24 [2020-10-29 03:59:43,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:43,220 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-29 03:59:43,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:59:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-29 03:59:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 03:59:43,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:43,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:43,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:59:43,222 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:43,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:43,223 INFO L82 PathProgramCache]: Analyzing trace with hash -11723484, now seen corresponding path program 2 times [2020-10-29 03:59:43,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:43,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174481602] [2020-10-29 03:59:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:43,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:43,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:44,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:44,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:59:44,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:59:44,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1614 [2020-10-29 03:59:44,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:44,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:44,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:59:44,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:44,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:59:44,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:45,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:45,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:45,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:45,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:45,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:45,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 03:59:45,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:45,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:45,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:45,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:45,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:45,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:59:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:45,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174481602] [2020-10-29 03:59:45,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:45,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:59:45,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322297854] [2020-10-29 03:59:45,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:59:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:59:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:59:45,297 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 14 states. [2020-10-29 03:59:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:46,281 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-10-29 03:59:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:59:46,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-29 03:59:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:46,283 INFO L225 Difference]: With dead ends: 106 [2020-10-29 03:59:46,284 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 03:59:46,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:59:46,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 03:59:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-10-29 03:59:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 03:59:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-10-29 03:59:46,310 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 24 [2020-10-29 03:59:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:46,311 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-10-29 03:59:46,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:59:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-10-29 03:59:46,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 03:59:46,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:46,315 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:46,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:59:46,316 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:46,316 INFO L82 PathProgramCache]: Analyzing trace with hash -586005676, now seen corresponding path program 2 times [2020-10-29 03:59:46,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:46,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643114999] [2020-10-29 03:59:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:46,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:46,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:51,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:51,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 03:59:51,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:59:51,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:59:51,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:51,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:51,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:59:51,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:51,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:59:51,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:51,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:51,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:51,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:51,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:51,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:51,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:59:51,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:51,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:51,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:51,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:51,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:51,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:51,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643114999] [2020-10-29 03:59:51,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:51,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:59:51,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612679165] [2020-10-29 03:59:51,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:59:51,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:51,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:59:51,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:59:51,849 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 13 states. [2020-10-29 03:59:53,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:53,312 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2020-10-29 03:59:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:59:53,313 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-29 03:59:53,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:53,315 INFO L225 Difference]: With dead ends: 122 [2020-10-29 03:59:53,315 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 03:59:53,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:59:53,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 03:59:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-10-29 03:59:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 03:59:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-29 03:59:53,334 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 27 [2020-10-29 03:59:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:53,334 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-29 03:59:53,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:59:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-29 03:59:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 03:59:53,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:53,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:53,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:59:53,337 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:53,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1607074030, now seen corresponding path program 1 times [2020-10-29 03:59:53,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:53,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450870535] [2020-10-29 03:59:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:53,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:53,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:54,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:55,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:56,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:56,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:57,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:58,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:58,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 03:59:58,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:59:58,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:59:58,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:58,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:58,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:59:58,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 03:59:58,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:59:58,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:58,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:59:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:58,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:59:58,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:59:58,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:59:58,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:59:58,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:59:58,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:59:58,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:59:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:59:58,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:59:58,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:59:58,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:59:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:59:58,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450870535] [2020-10-29 03:59:58,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:59:58,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:59:58,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454554583] [2020-10-29 03:59:58,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:59:58,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:59:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:59:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:59:58,824 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 12 states. [2020-10-29 03:59:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:59:59,855 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2020-10-29 03:59:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:59:59,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-29 03:59:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:59:59,857 INFO L225 Difference]: With dead ends: 133 [2020-10-29 03:59:59,857 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:59:59,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:59:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:59:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2020-10-29 03:59:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 03:59:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2020-10-29 03:59:59,885 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 27 [2020-10-29 03:59:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:59:59,885 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2020-10-29 03:59:59,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:59:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2020-10-29 03:59:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 03:59:59,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:59:59,895 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:59:59,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:59:59,895 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:59:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:59:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1403654126, now seen corresponding path program 2 times [2020-10-29 03:59:59,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:59:59,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100778673] [2020-10-29 03:59:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:59:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:59:59,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:00,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:00,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:00,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:00,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:01,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:02,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:02,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 04:00:02,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:00:02,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2886 [2020-10-29 04:00:02,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:02,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:00:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 04:00:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 04:00:02,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:03,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:03,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:03,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:03,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:03,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:03,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 04:00:03,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:03,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:03,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:00:03,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:03,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:00:03,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:00:03,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100778673] [2020-10-29 04:00:03,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:03,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:00:03,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397702210] [2020-10-29 04:00:03,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:00:03,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:03,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:00:03,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:00:03,066 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 14 states. [2020-10-29 04:00:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:04,041 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2020-10-29 04:00:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:00:04,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-10-29 04:00:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:04,044 INFO L225 Difference]: With dead ends: 123 [2020-10-29 04:00:04,044 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 04:00:04,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-10-29 04:00:04,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 04:00:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 86. [2020-10-29 04:00:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 04:00:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-10-29 04:00:04,063 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 27 [2020-10-29 04:00:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:04,063 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-10-29 04:00:04,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:00:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-10-29 04:00:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:00:04,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:04,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:04,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 04:00:04,065 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1216248247, now seen corresponding path program 3 times [2020-10-29 04:00:04,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:04,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048955833] [2020-10-29 04:00:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:04,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:04,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:05,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:08,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:08,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:00:08,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:00:08,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4695 [2020-10-29 04:00:08,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:08,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:08,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:00:08,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:08,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 04:00:08,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:09,298 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-29 04:00:09,450 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-29 04:00:09,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:09,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:09,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:09,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:09,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:09,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 04:00:09,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:09,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:09,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:09,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:09,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:09,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:00:09,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048955833] [2020-10-29 04:00:09,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:09,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 04:00:09,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412605979] [2020-10-29 04:00:09,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 04:00:09,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 04:00:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-29 04:00:09,819 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 19 states. [2020-10-29 04:00:11,472 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-29 04:00:11,780 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-29 04:00:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:13,350 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2020-10-29 04:00:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 04:00:13,350 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 04:00:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:13,353 INFO L225 Difference]: With dead ends: 154 [2020-10-29 04:00:13,353 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 04:00:13,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 04:00:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 04:00:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 90. [2020-10-29 04:00:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 04:00:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2020-10-29 04:00:13,384 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 28 [2020-10-29 04:00:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:13,384 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2020-10-29 04:00:13,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 04:00:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2020-10-29 04:00:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:00:13,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:13,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:13,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 04:00:13,387 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:13,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2077177161, now seen corresponding path program 4 times [2020-10-29 04:00:13,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:13,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384507377] [2020-10-29 04:00:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:13,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:13,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:13,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:14,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:15,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:15,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:00:15,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:00:15,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2576 [2020-10-29 04:00:15,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:15,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:00:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 04:00:15,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:16,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:16,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:16,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:16,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:16,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:16,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:00:16,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:16,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:16,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:16,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:16,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:16,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:00:16,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384507377] [2020-10-29 04:00:16,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:16,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 04:00:16,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550538044] [2020-10-29 04:00:16,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 04:00:16,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:16,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 04:00:16,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-29 04:00:16,502 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 19 states. [2020-10-29 04:00:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:19,959 INFO L93 Difference]: Finished difference Result 177 states and 209 transitions. [2020-10-29 04:00:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 04:00:19,960 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 04:00:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:19,963 INFO L225 Difference]: With dead ends: 177 [2020-10-29 04:00:19,964 INFO L226 Difference]: Without dead ends: 173 [2020-10-29 04:00:19,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=450, Invalid=2202, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 04:00:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-29 04:00:19,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 91. [2020-10-29 04:00:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 04:00:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2020-10-29 04:00:19,984 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2020-10-29 04:00:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:19,985 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2020-10-29 04:00:19,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 04:00:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2020-10-29 04:00:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:00:19,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:19,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:19,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 04:00:19,986 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1490371147, now seen corresponding path program 5 times [2020-10-29 04:00:19,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:19,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658218908] [2020-10-29 04:00:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:20,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:20,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:20,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:21,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:21,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:23,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:23,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:00:23,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:00:23,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3343 [2020-10-29 04:00:23,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:23,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:23,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:00:23,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:23,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 04:00:23,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:23,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:23,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:23,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:23,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:23,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:23,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:00:23,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:23,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:23,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:23,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:00:23,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658218908] [2020-10-29 04:00:23,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:23,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 04:00:23,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816215773] [2020-10-29 04:00:23,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 04:00:23,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 04:00:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-29 04:00:23,856 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand 19 states. [2020-10-29 04:00:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:25,168 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2020-10-29 04:00:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 04:00:25,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 04:00:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:25,170 INFO L225 Difference]: With dead ends: 146 [2020-10-29 04:00:25,170 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 04:00:25,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2020-10-29 04:00:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 04:00:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 86. [2020-10-29 04:00:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 04:00:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-10-29 04:00:25,190 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 28 [2020-10-29 04:00:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:25,190 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-10-29 04:00:25,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 04:00:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-10-29 04:00:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:00:25,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:25,191 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:00:25,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 04:00:25,191 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash -206740407, now seen corresponding path program 6 times [2020-10-29 04:00:25,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:25,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884878853] [2020-10-29 04:00:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:25,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:25,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:26,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:27,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:27,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:00:27,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:00:27,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2333 [2020-10-29 04:00:27,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:27,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:27,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:00:27,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:27,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 04:00:27,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:28,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:28,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:28,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:28,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:28,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:28,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 04:00:28,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:28,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:28,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:28,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:28,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:28,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:00:28,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884878853] [2020-10-29 04:00:28,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:28,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:00:28,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068942784] [2020-10-29 04:00:28,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 04:00:28,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:28,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 04:00:28,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:00:28,307 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 17 states. [2020-10-29 04:00:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:29,057 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2020-10-29 04:00:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 04:00:29,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-29 04:00:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:29,061 INFO L225 Difference]: With dead ends: 131 [2020-10-29 04:00:29,061 INFO L226 Difference]: Without dead ends: 118 [2020-10-29 04:00:29,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-10-29 04:00:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-29 04:00:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 86. [2020-10-29 04:00:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 04:00:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-10-29 04:00:29,081 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 28 [2020-10-29 04:00:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:29,081 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-10-29 04:00:29,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 04:00:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-10-29 04:00:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 04:00:29,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:29,082 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, 1] [2020-10-29 04:00:29,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 04:00:29,082 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash -383672476, now seen corresponding path program 3 times [2020-10-29 04:00:29,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:29,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004435288] [2020-10-29 04:00:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:29,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:29,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:29,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:29,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:30,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:30,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:30,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:30,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:30,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:31,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:31,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:32,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:32,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:33,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:34,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:34,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:34,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 04:00:34,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 04:00:34,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-29 04:00:34,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:34,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:34,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:00:34,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:00:34,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 04:00:34,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:34,716 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2020-10-29 04:00:35,446 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 116 [2020-10-29 04:00:36,293 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 121 [2020-10-29 04:00:37,082 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 118 [2020-10-29 04:00:37,644 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 100 [2020-10-29 04:00:37,952 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 04:00:38,311 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-29 04:00:38,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:00:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:38,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:38,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:00:38,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:00:38,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:00:38,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:00:38,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:00:38,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:00:38,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:00:38,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:00:38,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:00:38,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:00:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:00:38,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004435288] [2020-10-29 04:00:38,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:00:38,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:00:38,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22663766] [2020-10-29 04:00:38,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 04:00:38,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:00:38,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 04:00:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:00:38,477 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 17 states. [2020-10-29 04:00:39,062 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 41 [2020-10-29 04:00:42,543 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 04:00:44,218 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2020-10-29 04:00:45,042 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 04:00:47,043 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 138 DAG size of output: 138 [2020-10-29 04:00:49,092 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 142 DAG size of output: 142 [2020-10-29 04:00:54,273 WARN L193 SmtUtils]: Spent 4.76 s on a formula simplification. DAG size of input: 146 DAG size of output: 130 [2020-10-29 04:00:56,561 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 135 DAG size of output: 123 [2020-10-29 04:00:58,950 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 139 DAG size of output: 127 [2020-10-29 04:00:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:00:59,811 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2020-10-29 04:00:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 04:00:59,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-29 04:00:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:00:59,814 INFO L225 Difference]: With dead ends: 130 [2020-10-29 04:00:59,814 INFO L226 Difference]: Without dead ends: 110 [2020-10-29 04:00:59,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2020-10-29 04:00:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-29 04:00:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2020-10-29 04:00:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 04:00:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2020-10-29 04:00:59,860 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 30 [2020-10-29 04:00:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:00:59,860 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2020-10-29 04:00:59,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 04:00:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2020-10-29 04:00:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 04:00:59,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:00:59,861 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, 1] [2020-10-29 04:00:59,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 04:00:59,862 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:00:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:00:59,863 INFO L82 PathProgramCache]: Analyzing trace with hash -500167068, now seen corresponding path program 4 times [2020-10-29 04:00:59,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:00:59,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374202785] [2020-10-29 04:00:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:00:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:00:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:00:59,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:00,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:00,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:00,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:00,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:01,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:01,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:01,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:02,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:04,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:04,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 04:01:04,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 04:01:04,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 04:01:04,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:04,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:04,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:01:04,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:04,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 04:01:04,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:05,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:05,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:05,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:05,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:05,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:05,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:01:05,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:05,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:05,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:05,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374202785] [2020-10-29 04:01:05,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:05,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 04:01:05,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704233740] [2020-10-29 04:01:05,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 04:01:05,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:05,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 04:01:05,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-29 04:01:05,290 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand 12 states. [2020-10-29 04:01:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:06,230 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2020-10-29 04:01:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 04:01:06,231 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-29 04:01:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:06,232 INFO L225 Difference]: With dead ends: 130 [2020-10-29 04:01:06,233 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 04:01:06,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-29 04:01:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 04:01:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-29 04:01:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 04:01:06,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-10-29 04:01:06,258 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 30 [2020-10-29 04:01:06,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:06,258 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-10-29 04:01:06,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 04:01:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-10-29 04:01:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 04:01:06,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:06,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:01:06,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 04:01:06,259 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:06,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2105856486, now seen corresponding path program 2 times [2020-10-29 04:01:06,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:06,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569394478] [2020-10-29 04:01:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:06,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:06,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:06,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:06,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:06,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:07,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:07,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:07,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:08,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:08,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:08,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:09,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:11,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:11,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 04:01:11,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 04:01:11,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4774 [2020-10-29 04:01:11,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:11,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:11,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:01:11,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:11,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 04:01:11,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:11,328 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-29 04:01:11,473 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-29 04:01:11,828 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-29 04:01:12,075 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-29 04:01:12,296 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-29 04:01:13,103 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2020-10-29 04:01:13,946 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-10-29 04:01:14,756 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2020-10-29 04:01:15,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:15,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:15,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:15,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:15,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:15,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:01:15,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:15,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:15,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:15,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:15,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:15,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:15,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569394478] [2020-10-29 04:01:15,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:15,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:01:15,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459852979] [2020-10-29 04:01:15,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 04:01:15,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:15,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 04:01:15,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:01:15,059 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 17 states. [2020-10-29 04:01:15,431 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 51 [2020-10-29 04:01:15,582 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 24 [2020-10-29 04:01:15,878 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-29 04:01:16,131 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-10-29 04:01:16,543 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 49 [2020-10-29 04:01:17,455 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-29 04:01:18,021 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-29 04:01:18,981 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 93 [2020-10-29 04:01:20,058 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 101 [2020-10-29 04:01:21,257 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 99 [2020-10-29 04:01:21,789 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-29 04:01:22,803 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2020-10-29 04:01:23,800 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2020-10-29 04:01:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:24,589 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2020-10-29 04:01:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 04:01:24,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-29 04:01:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:24,592 INFO L225 Difference]: With dead ends: 134 [2020-10-29 04:01:24,592 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 04:01:24,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2020-10-29 04:01:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 04:01:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 91. [2020-10-29 04:01:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 04:01:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2020-10-29 04:01:24,620 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 30 [2020-10-29 04:01:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:24,620 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2020-10-29 04:01:24,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 04:01:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2020-10-29 04:01:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:01:24,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:24,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:01:24,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 04:01:24,621 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:24,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:24,622 INFO L82 PathProgramCache]: Analyzing trace with hash 71957775, now seen corresponding path program 3 times [2020-10-29 04:01:24,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:24,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700622274] [2020-10-29 04:01:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:24,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:24,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:25,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:27,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:29,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:29,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:01:29,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:01:29,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 04:01:29,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:29,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:29,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:01:29,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:29,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 04:01:29,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:30,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:30,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:30,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:30,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:30,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:30,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 04:01:30,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:30,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:30,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:30,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:30,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:30,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 04:01:30,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700622274] [2020-10-29 04:01:30,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:30,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:01:30,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728272185] [2020-10-29 04:01:30,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 04:01:30,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 04:01:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-29 04:01:30,418 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand 15 states. [2020-10-29 04:01:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:31,786 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2020-10-29 04:01:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 04:01:31,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-29 04:01:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:31,789 INFO L225 Difference]: With dead ends: 140 [2020-10-29 04:01:31,789 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 04:01:31,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:01:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 04:01:31,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2020-10-29 04:01:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 04:01:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2020-10-29 04:01:31,822 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 31 [2020-10-29 04:01:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:31,822 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2020-10-29 04:01:31,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 04:01:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2020-10-29 04:01:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:01:31,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:31,823 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:01:31,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 04:01:31,823 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash -949110579, now seen corresponding path program 5 times [2020-10-29 04:01:31,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:31,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054422991] [2020-10-29 04:01:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:31,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:31,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:32,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:32,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:33,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:34,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:36,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:36,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:01:36,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:01:36,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 04:01:36,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:36,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 04:01:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 04:01:36,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:37,340 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-29 04:01:37,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:37,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:37,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:37,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:37,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 04:01:37,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:37,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:37,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:37,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:37,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:37,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:37,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054422991] [2020-10-29 04:01:37,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:37,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:01:37,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130516608] [2020-10-29 04:01:37,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 04:01:37,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:37,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 04:01:37,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:01:37,824 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand 17 states. [2020-10-29 04:01:38,303 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-29 04:01:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:39,421 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2020-10-29 04:01:39,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 04:01:39,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-29 04:01:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:39,424 INFO L225 Difference]: With dead ends: 144 [2020-10-29 04:01:39,425 INFO L226 Difference]: Without dead ends: 131 [2020-10-29 04:01:39,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2020-10-29 04:01:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-29 04:01:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2020-10-29 04:01:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 04:01:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-10-29 04:01:39,457 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 31 [2020-10-29 04:01:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:39,457 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-10-29 04:01:39,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 04:01:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-10-29 04:01:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:01:39,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:39,458 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:01:39,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 04:01:39,458 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:39,459 INFO L82 PathProgramCache]: Analyzing trace with hash -62055731, now seen corresponding path program 6 times [2020-10-29 04:01:39,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:39,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89260588] [2020-10-29 04:01:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:39,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:39,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:41,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:41,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:43,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:43,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:01:43,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:01:43,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4107 [2020-10-29 04:01:43,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:43,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:43,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:01:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 04:01:43,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:44,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:44,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:44,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:44,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:44,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:44,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:01:44,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:44,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:44,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:44,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:44,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:44,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:44,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89260588] [2020-10-29 04:01:44,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:44,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 04:01:44,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449941215] [2020-10-29 04:01:44,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 04:01:44,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 04:01:44,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-29 04:01:44,471 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 18 states. [2020-10-29 04:01:44,982 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-29 04:01:45,980 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-29 04:01:46,148 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-29 04:01:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:47,810 INFO L93 Difference]: Finished difference Result 175 states and 198 transitions. [2020-10-29 04:01:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 04:01:47,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-29 04:01:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:47,815 INFO L225 Difference]: With dead ends: 175 [2020-10-29 04:01:47,815 INFO L226 Difference]: Without dead ends: 171 [2020-10-29 04:01:47,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 04:01:47,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-29 04:01:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2020-10-29 04:01:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-29 04:01:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2020-10-29 04:01:47,868 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 31 [2020-10-29 04:01:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:47,869 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2020-10-29 04:01:47,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 04:01:47,869 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2020-10-29 04:01:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:01:47,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:47,870 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:01:47,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 04:01:47,870 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:47,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1083124085, now seen corresponding path program 7 times [2020-10-29 04:01:47,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:47,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498699531] [2020-10-29 04:01:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:47,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:47,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:48,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:48,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:49,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:49,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:49,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:50,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:50,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:51,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:51,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:01:51,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:01:51,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3838 [2020-10-29 04:01:51,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:51,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:01:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 04:01:51,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:52,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:52,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:52,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:52,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:52,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:52,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:01:52,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:52,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:52,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:52,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:52,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498699531] [2020-10-29 04:01:52,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:52,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 04:01:52,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485602487] [2020-10-29 04:01:52,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 04:01:52,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:52,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 04:01:52,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-29 04:01:52,520 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand 18 states. [2020-10-29 04:01:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:01:54,948 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2020-10-29 04:01:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 04:01:54,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-29 04:01:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:01:54,954 INFO L225 Difference]: With dead ends: 186 [2020-10-29 04:01:54,955 INFO L226 Difference]: Without dead ends: 182 [2020-10-29 04:01:54,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 04:01:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-29 04:01:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 112. [2020-10-29 04:01:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-29 04:01:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2020-10-29 04:01:54,995 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 31 [2020-10-29 04:01:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:01:54,995 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2020-10-29 04:01:54,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 04:01:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2020-10-29 04:01:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:01:54,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:01:54,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:01:54,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 04:01:54,996 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:01:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:01:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash -879704181, now seen corresponding path program 8 times [2020-10-29 04:01:54,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:01:54,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111169465] [2020-10-29 04:01:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:01:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:55,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:57,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:58,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:58,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:01:58,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:01:58,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3410 [2020-10-29 04:01:58,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:58,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:58,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:01:58,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:01:58,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 04:01:58,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:58,798 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-10-29 04:01:59,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:01:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:01:59,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:01:59,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:01:59,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:01:59,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:01:59,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 04:01:59,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:01:59,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:01:59,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:01:59,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:01:59,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:01:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:01:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:01:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111169465] [2020-10-29 04:01:59,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:01:59,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 04:01:59,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383763142] [2020-10-29 04:01:59,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:01:59,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:01:59,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:01:59,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:01:59,439 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand 16 states. [2020-10-29 04:02:01,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:01,277 INFO L93 Difference]: Finished difference Result 175 states and 202 transitions. [2020-10-29 04:02:01,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 04:02:01,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-29 04:02:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:01,280 INFO L225 Difference]: With dead ends: 175 [2020-10-29 04:02:01,280 INFO L226 Difference]: Without dead ends: 162 [2020-10-29 04:02:01,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2020-10-29 04:02:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-29 04:02:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2020-10-29 04:02:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-29 04:02:01,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2020-10-29 04:02:01,333 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 31 [2020-10-29 04:02:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:01,333 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2020-10-29 04:02:01,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:02:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2020-10-29 04:02:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 04:02:01,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:01,334 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:01,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 04:02:01,334 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:01,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:01,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1058411504, now seen corresponding path program 3 times [2020-10-29 04:02:01,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:01,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487463883] [2020-10-29 04:02:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:01,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:01,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:01,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:01,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:01,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:02,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:02,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:02,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:03,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:04,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:05,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:05,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:06,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:06,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:06,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:06,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 04:02:06,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 04:02:06,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 04:02:06,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:06,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:02:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:02:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 04:02:06,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:06,846 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-29 04:02:07,184 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-29 04:02:07,496 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-29 04:02:07,738 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-29 04:02:08,175 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 57 [2020-10-29 04:02:08,624 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-29 04:02:08,835 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-29 04:02:09,008 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-29 04:02:09,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:09,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:09,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:09,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:09,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:09,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:02:09,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:09,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:09,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:02:09,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:09,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:02:09,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 04:02:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487463883] [2020-10-29 04:02:09,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:09,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:02:09,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724650449] [2020-10-29 04:02:09,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 04:02:09,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:09,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 04:02:09,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:02:09,376 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand 17 states. [2020-10-29 04:02:09,901 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-10-29 04:02:10,336 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2020-10-29 04:02:10,806 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2020-10-29 04:02:11,224 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-10-29 04:02:11,789 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-29 04:02:12,263 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 04:02:12,763 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-29 04:02:13,341 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-29 04:02:13,758 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 04:02:14,296 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-29 04:02:14,823 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-29 04:02:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:15,179 INFO L93 Difference]: Finished difference Result 152 states and 175 transitions. [2020-10-29 04:02:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:02:15,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-29 04:02:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:15,182 INFO L225 Difference]: With dead ends: 152 [2020-10-29 04:02:15,182 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 04:02:15,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-10-29 04:02:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 04:02:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-29 04:02:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 04:02:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-10-29 04:02:15,233 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 33 [2020-10-29 04:02:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:15,233 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-10-29 04:02:15,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 04:02:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-10-29 04:02:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 04:02:15,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:15,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:15,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 04:02:15,234 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:15,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:15,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1908038199, now seen corresponding path program 9 times [2020-10-29 04:02:15,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:15,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750667265] [2020-10-29 04:02:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:15,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:15,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:15,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:16,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:16,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:16,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:17,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:18,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:18,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:19,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:20,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:20,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 04:02:20,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 04:02:20,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 04:02:20,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:20,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 04:02:20,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:02:20,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 04:02:20,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:20,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:20,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:20,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:20,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:20,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:20,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 04:02:20,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:20,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:20,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:02:20,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:20,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:02:20,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:02:20,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750667265] [2020-10-29 04:02:20,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:20,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:02:20,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769244493] [2020-10-29 04:02:20,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 04:02:20,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:20,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 04:02:20,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 04:02:20,864 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 15 states. [2020-10-29 04:02:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:22,840 INFO L93 Difference]: Finished difference Result 218 states and 247 transitions. [2020-10-29 04:02:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 04:02:22,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-29 04:02:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:22,844 INFO L225 Difference]: With dead ends: 218 [2020-10-29 04:02:22,844 INFO L226 Difference]: Without dead ends: 205 [2020-10-29 04:02:22,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-29 04:02:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-29 04:02:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 133. [2020-10-29 04:02:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 04:02:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2020-10-29 04:02:22,898 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 34 [2020-10-29 04:02:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:22,898 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2020-10-29 04:02:22,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 04:02:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2020-10-29 04:02:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 04:02:22,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:22,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:22,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 04:02:22,899 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:22,900 INFO L82 PathProgramCache]: Analyzing trace with hash 697985355, now seen corresponding path program 10 times [2020-10-29 04:02:22,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:22,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933519725] [2020-10-29 04:02:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:22,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:22,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:22,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:23,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:23,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:24,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:24,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:25,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:26,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:27,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:27,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:27,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 04:02:27,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 04:02:27,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 04:02:27,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:27,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:02:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:02:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 04:02:27,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:28,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:28,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:28,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:28,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:28,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:28,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:02:28,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:28,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:28,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:02:28,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:28,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:02:28,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:02:28,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933519725] [2020-10-29 04:02:28,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:28,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 04:02:28,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706682203] [2020-10-29 04:02:28,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:02:28,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:28,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:02:28,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:02:28,254 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand 14 states. [2020-10-29 04:02:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:29,979 INFO L93 Difference]: Finished difference Result 232 states and 264 transitions. [2020-10-29 04:02:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:02:29,982 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-29 04:02:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:29,984 INFO L225 Difference]: With dead ends: 232 [2020-10-29 04:02:29,984 INFO L226 Difference]: Without dead ends: 184 [2020-10-29 04:02:29,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-29 04:02:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-29 04:02:30,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2020-10-29 04:02:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-29 04:02:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2020-10-29 04:02:30,047 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 34 [2020-10-29 04:02:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:30,047 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2020-10-29 04:02:30,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:02:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2020-10-29 04:02:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 04:02:30,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:30,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:30,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 04:02:30,049 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash 581490763, now seen corresponding path program 11 times [2020-10-29 04:02:30,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:30,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966958162] [2020-10-29 04:02:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:30,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:30,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:30,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:30,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:30,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:31,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:35,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:35,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 04:02:35,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:02:35,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 04:02:35,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:35,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:02:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 04:02:35,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 04:02:35,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:35,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:35,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:35,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:35,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:35,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:35,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:02:35,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:35,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:35,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:02:35,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:35,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:02:35,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:02:35,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966958162] [2020-10-29 04:02:35,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:35,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:02:35,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739605437] [2020-10-29 04:02:35,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:02:35,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:35,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:02:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:02:35,616 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand 16 states. [2020-10-29 04:02:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:37,548 INFO L93 Difference]: Finished difference Result 203 states and 230 transitions. [2020-10-29 04:02:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 04:02:37,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-29 04:02:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:37,551 INFO L225 Difference]: With dead ends: 203 [2020-10-29 04:02:37,552 INFO L226 Difference]: Without dead ends: 199 [2020-10-29 04:02:37,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2020-10-29 04:02:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-29 04:02:37,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 164. [2020-10-29 04:02:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 04:02:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2020-10-29 04:02:37,613 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 34 [2020-10-29 04:02:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:37,614 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2020-10-29 04:02:37,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:02:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2020-10-29 04:02:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 04:02:37,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:37,615 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:37,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 04:02:37,615 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:37,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:37,615 INFO L82 PathProgramCache]: Analyzing trace with hash -756387832, now seen corresponding path program 12 times [2020-10-29 04:02:37,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:37,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167104517] [2020-10-29 04:02:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:37,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:37,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:38,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:40,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:42,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:42,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 04:02:42,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:02:42,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-29 04:02:42,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:42,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 04:02:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:02:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 04:02:42,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:43,359 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-29 04:02:43,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:43,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:44,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:44,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:44,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:44,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 04:02:44,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:44,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:44,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:02:44,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:44,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:02:44,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 04:02:44,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167104517] [2020-10-29 04:02:44,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:44,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 04:02:44,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123713774] [2020-10-29 04:02:44,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 04:02:44,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 04:02:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-29 04:02:44,017 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand 20 states. [2020-10-29 04:02:44,528 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-29 04:02:45,411 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-29 04:02:45,849 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-29 04:02:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:02:46,763 INFO L93 Difference]: Finished difference Result 228 states and 261 transitions. [2020-10-29 04:02:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 04:02:46,765 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-10-29 04:02:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:02:46,768 INFO L225 Difference]: With dead ends: 228 [2020-10-29 04:02:46,768 INFO L226 Difference]: Without dead ends: 224 [2020-10-29 04:02:46,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 04:02:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-29 04:02:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 186. [2020-10-29 04:02:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-29 04:02:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2020-10-29 04:02:46,832 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 35 [2020-10-29 04:02:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:02:46,832 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2020-10-29 04:02:46,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 04:02:46,832 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2020-10-29 04:02:46,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 04:02:46,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:02:46,834 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:02:46,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 04:02:46,834 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:02:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:02:46,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1777456186, now seen corresponding path program 13 times [2020-10-29 04:02:46,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:02:46,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512845759] [2020-10-29 04:02:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:02:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:46,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:46,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:47,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:47,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:48,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:48,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:49,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:50,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:51,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:51,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:51,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 04:02:51,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:02:51,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 04:02:51,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:51,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 04:02:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:02:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 04:02:51,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:52,447 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-29 04:02:52,613 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-29 04:02:53,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:02:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:02:53,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:02:53,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:02:53,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:02:53,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:02:53,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:02:53,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:02:53,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:02:53,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:02:53,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:02:53,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:02:53,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:02:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:02:53,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512845759] [2020-10-29 04:02:53,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:02:53,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 04:02:53,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693883449] [2020-10-29 04:02:53,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 04:02:53,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:02:53,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 04:02:53,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-29 04:02:53,137 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand 21 states. [2020-10-29 04:02:55,454 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-29 04:02:55,833 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-29 04:02:56,513 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56