/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=DEEPEST --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-tiling/rewnif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:57:21,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:57:21,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:57:21,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:57:21,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:57:21,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:57:21,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:57:21,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:57:21,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:57:21,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:57:21,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:57:21,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:57:21,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:57:21,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:57:21,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:57:21,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:57:21,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:57:21,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:57:21,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:57:21,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:57:21,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:57:21,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:57:21,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:57:21,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:57:21,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:57:21,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:57:21,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:57:21,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:57:21,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:57:21,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:57:21,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:57:21,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:57:21,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:57:21,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:57:21,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:57:21,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:57:21,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:57:21,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:57:21,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:57:21,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:57:21,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:57:21,424 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 [2020-10-27 14:57:21,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:57:21,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:57:21,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:57:21,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:57:21,480 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:57:21,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:57:21,480 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:57:21,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:57:21,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:57:21,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:57:21,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:57:21,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:57:21,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:57:21,483 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:57:21,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:57:21,483 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:57:21,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:57:21,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:57:21,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:57:21,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:57:21,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:57:21,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:57:21,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:57:21,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:57:21,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:57:21,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:57:21,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:57:21,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:57:21,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:57:21,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:57:21,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:57:21,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:57:21,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:57:21,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:57:21,937 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:57:21,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rewnif.c [2020-10-27 14:57:22,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/869c66d75/36740735ce0f41a6abacadb96e7351d9/FLAG79ecd7339 [2020-10-27 14:57:22,700 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:57:22,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/rewnif.c [2020-10-27 14:57:22,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/869c66d75/36740735ce0f41a6abacadb96e7351d9/FLAG79ecd7339 [2020-10-27 14:57:23,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/869c66d75/36740735ce0f41a6abacadb96e7351d9 [2020-10-27 14:57:23,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:57:23,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:57:23,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:57:23,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:57:23,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:57:23,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:57:23" (1/1) ... [2020-10-27 14:57:23,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a1cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23, skipping insertion in model container [2020-10-27 14:57:23,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:57:23" (1/1) ... [2020-10-27 14:57:23,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:57:23,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:57:23,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:57:23,292 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:57:23,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:57:23,330 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:57:23,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23 WrapperNode [2020-10-27 14:57:23,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:57:23,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:57:23,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:57:23,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:57:23,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23" (1/1) ... [2020-10-27 14:57:23,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23" (1/1) ... [2020-10-27 14:57:23,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23" (1/1) ... [2020-10-27 14:57:23,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23" (1/1) ... [2020-10-27 14:57:23,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23" (1/1) ... [2020-10-27 14:57:23,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23" (1/1) ... [2020-10-27 14:57:23,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23" (1/1) ... [2020-10-27 14:57:23,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:57:23,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:57:23,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:57:23,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:57:23,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23" (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 [2020-10-27 14:57:23,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:57:23,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:57:23,478 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:57:23,478 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:57:23,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:57:23,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:57:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:57:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:57:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:57:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:57:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:57:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:57:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:57:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:57:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:57:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:57:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:57:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:57:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:57:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:57:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:57:23,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:57:24,014 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:57:24,015 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:57:24,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:57:24 BoogieIcfgContainer [2020-10-27 14:57:24,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:57:24,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:57:24,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:57:24,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:57:24,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:57:23" (1/3) ... [2020-10-27 14:57:24,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dc4125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:57:24, skipping insertion in model container [2020-10-27 14:57:24,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:57:23" (2/3) ... [2020-10-27 14:57:24,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dc4125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:57:24, skipping insertion in model container [2020-10-27 14:57:24,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:57:24" (3/3) ... [2020-10-27 14:57:24,030 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnif.c [2020-10-27 14:57:24,043 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:57:24,055 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:57:24,072 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:57:24,123 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:57:24,123 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:57:24,123 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:57:24,123 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:57:24,123 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:57:24,124 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:57:24,124 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:57:24,124 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:57:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-27 14:57:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 14:57:24,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:24,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:24,160 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:24,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1534732962, now seen corresponding path program 1 times [2020-10-27 14:57:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:24,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220150857] [2020-10-27 14:57:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:24,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:24,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:24,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 14:57:24,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:24,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-27 14:57:24,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:24,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:24,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:57:24,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:24,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:57:24,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:24,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:24,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:24,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:24,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 14:57:24,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:24,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:24,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:57:24,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220150857] [2020-10-27 14:57:24,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:57:24,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:57:24,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140266448] [2020-10-27 14:57:24,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:57:24,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:57:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:57:24,955 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-27 14:57:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:25,086 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-10-27 14:57:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:57:25,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 14:57:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:25,098 INFO L225 Difference]: With dead ends: 48 [2020-10-27 14:57:25,099 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 14:57:25,107 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 [2020-10-27 14:57:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 14:57:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 14:57:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 14:57:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 14:57:25,150 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-10-27 14:57:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:25,151 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 14:57:25,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:57:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 14:57:25,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 14:57:25,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:25,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:25,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:57:25,153 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:25,154 INFO L82 PathProgramCache]: Analyzing trace with hash 353035087, now seen corresponding path program 1 times [2020-10-27 14:57:25,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:25,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815144881] [2020-10-27 14:57:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:25,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:25,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:25,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 14:57:25,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:25,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 14:57:25,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:25,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:25,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:25,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:57:25,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:25,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:25,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:25,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:25,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:25,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:25,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:57:25,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:25,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:25,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:25,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:25,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:57:25,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815144881] [2020-10-27 14:57:25,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:57:25,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:57:25,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889629765] [2020-10-27 14:57:25,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:57:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:57:25,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:57:25,436 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-10-27 14:57:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:25,527 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-27 14:57:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:57:25,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 14:57:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:25,529 INFO L225 Difference]: With dead ends: 43 [2020-10-27 14:57:25,529 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 14:57:25,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:57:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 14:57:25,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 14:57:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 14:57:25,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 14:57:25,540 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2020-10-27 14:57:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:25,541 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 14:57:25,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:57:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 14:57:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:57:25,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:25,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:25,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:57:25,542 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:25,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1307166964, now seen corresponding path program 1 times [2020-10-27 14:57:25,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:25,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453872109] [2020-10-27 14:57:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:25,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:25,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:26,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:26,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:57:26,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:57:26,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-27 14:57:26,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:26,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:57:26,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:57:26,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:57:26,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:57:26,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:26,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:26,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:26,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:26,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:26,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:57:26,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:26,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:26,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:26,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:57:26,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453872109] [2020-10-27 14:57:26,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:57:26,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:57:26,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354676554] [2020-10-27 14:57:26,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:57:26,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:57:26,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:57:26,343 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-10-27 14:57:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:26,436 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 14:57:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:57:26,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 14:57:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:26,438 INFO L225 Difference]: With dead ends: 40 [2020-10-27 14:57:26,438 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 14:57:26,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:57:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 14:57:26,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 14:57:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 14:57:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 14:57:26,447 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2020-10-27 14:57:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:26,447 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 14:57:26,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:57:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 14:57:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:57:26,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:26,448 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] [2020-10-27 14:57:26,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:57:26,449 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:26,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:26,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1246971493, now seen corresponding path program 1 times [2020-10-27 14:57:26,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:26,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799423529] [2020-10-27 14:57:26,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:26,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:26,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:26,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:57:26,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:26,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 14:57:26,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:26,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:57:26,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:26,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:57:26,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:26,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:26,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:26,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:26,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:26,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:26,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:57:26,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:26,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:26,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:26,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:26,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:57:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:57:26,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799423529] [2020-10-27 14:57:26,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:26,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:57:26,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967616938] [2020-10-27 14:57:26,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:57:26,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:57:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:57:26,909 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2020-10-27 14:57:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:27,237 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-27 14:57:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:57:27,237 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-27 14:57:27,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:27,240 INFO L225 Difference]: With dead ends: 51 [2020-10-27 14:57:27,241 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:57:27,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:57:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:57:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-27 14:57:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:57:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-27 14:57:27,256 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2020-10-27 14:57:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:27,257 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-27 14:57:27,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:57:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-27 14:57:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:57:27,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:27,258 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] [2020-10-27 14:57:27,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:57:27,259 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:27,260 INFO L82 PathProgramCache]: Analyzing trace with hash -135124416, now seen corresponding path program 2 times [2020-10-27 14:57:27,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:27,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234217601] [2020-10-27 14:57:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:27,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:27,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:27,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:57:27,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:57:27,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-27 14:57:27,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:27,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:57:27,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:27,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:57:27,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:28,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:28,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:28,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:28,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:28,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:28,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:57:28,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:28,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:28,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:28,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:28,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:57:28,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234217601] [2020-10-27 14:57:28,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:28,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:57:28,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339005595] [2020-10-27 14:57:28,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:57:28,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:57:28,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:57:28,029 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-10-27 14:57:28,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:28,462 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-27 14:57:28,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:57:28,463 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-27 14:57:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:28,466 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:57:28,466 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 14:57:28,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:57:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 14:57:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-10-27 14:57:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 14:57:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-27 14:57:28,478 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 27 [2020-10-27 14:57:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:28,478 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-27 14:57:28,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:57:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-27 14:57:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:57:28,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:28,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:28,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:57:28,480 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:28,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1268347716, now seen corresponding path program 1 times [2020-10-27 14:57:28,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:28,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687093958] [2020-10-27 14:57:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:28,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:28,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:28,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:57:28,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:28,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 14:57:28,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:57:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:28,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:57:28,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:28,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:28,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:28,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:28,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:28,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:28,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:57:28,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:28,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:28,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:28,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:28,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:28,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 14:57:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:28,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:28,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:28,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:28,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:28,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:57:28,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:28,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:28,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:28,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:57:28,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:57:28,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687093958] [2020-10-27 14:57:28,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:28,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:57:28,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212403420] [2020-10-27 14:57:28,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:57:28,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:28,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:57:28,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:57:28,875 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 11 states. [2020-10-27 14:57:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:29,378 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-10-27 14:57:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:57:29,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:57:29,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:29,380 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:57:29,381 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 14:57:29,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:57:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 14:57:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-10-27 14:57:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:57:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-27 14:57:29,392 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 31 [2020-10-27 14:57:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:29,393 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-27 14:57:29,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:57:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-27 14:57:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:57:29,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:29,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:29,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:57:29,395 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1022050203, now seen corresponding path program 3 times [2020-10-27 14:57:29,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:29,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020883248] [2020-10-27 14:57:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:29,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:29,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:30,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:30,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:57:30,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:57:30,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-10-27 14:57:30,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:30,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:57:30,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:30,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:57:30,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:30,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:30,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:30,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:30,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:30,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:30,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:57:30,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:30,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:30,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:57:30,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020883248] [2020-10-27 14:57:30,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:30,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:57:30,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808492463] [2020-10-27 14:57:30,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:57:30,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:30,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:57:30,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:57:30,807 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 15 states. [2020-10-27 14:57:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:31,450 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-10-27 14:57:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:57:31,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-27 14:57:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:31,456 INFO L225 Difference]: With dead ends: 86 [2020-10-27 14:57:31,456 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 14:57:31,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:57:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 14:57:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-27 14:57:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:57:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-27 14:57:31,470 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 31 [2020-10-27 14:57:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:31,470 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-27 14:57:31,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:57:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-27 14:57:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:57:31,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:31,472 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:31,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:57:31,472 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:31,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1964346387, now seen corresponding path program 2 times [2020-10-27 14:57:31,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:31,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418694629] [2020-10-27 14:57:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:31,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:31,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:31,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:32,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:32,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:32,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:57:32,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:57:32,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1149 [2020-10-27 14:57:32,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:32,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:57:32,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:32,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:57:32,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:32,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:32,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:32,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:32,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:32,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:32,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:57:32,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:32,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:32,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:32,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:32,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:32,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 14:57:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:32,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:32,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:32,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:32,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:32,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:57:32,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:32,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:32,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:32,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:57:32,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:32,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 14:57:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:32,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:32,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:32,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:32,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:32,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:57:32,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:57:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:57:32,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:57:32,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418694629] [2020-10-27 14:57:32,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:32,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:57:32,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824396887] [2020-10-27 14:57:32,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:57:32,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:32,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:57:32,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:57:32,972 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 15 states. [2020-10-27 14:57:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:33,683 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2020-10-27 14:57:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:57:33,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 14:57:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:33,685 INFO L225 Difference]: With dead ends: 109 [2020-10-27 14:57:33,685 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:57:33,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:57:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:57:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-27 14:57:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:57:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-27 14:57:33,698 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 39 [2020-10-27 14:57:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:33,699 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-27 14:57:33,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:57:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-27 14:57:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:57:33,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:33,700 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:33,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:57:33,701 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:33,701 INFO L82 PathProgramCache]: Analyzing trace with hash 161157134, now seen corresponding path program 3 times [2020-10-27 14:57:33,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:33,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272622176] [2020-10-27 14:57:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:33,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:34,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:34,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:57:34,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:57:34,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-27 14:57:34,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:34,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:57:34,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:34,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:57:34,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:57:34,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:34,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:34,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:34,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:34,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:34,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:57:34,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:34,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:34,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:34,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:34,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:34,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 14:57:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:34,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:34,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:34,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:34,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:57:34,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:34,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:34,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:34,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:57:34,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:57:34,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272622176] [2020-10-27 14:57:34,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:34,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:57:34,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926879769] [2020-10-27 14:57:34,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:57:34,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:34,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:57:34,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:57:34,760 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-10-27 14:57:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:35,454 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-27 14:57:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:57:35,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 14:57:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:35,456 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:57:35,456 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 14:57:35,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:57:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 14:57:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-27 14:57:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:57:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-27 14:57:35,490 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 39 [2020-10-27 14:57:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:35,490 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-27 14:57:35,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:57:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-27 14:57:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:57:35,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:35,497 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:35,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:57:35,498 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash -238290286, now seen corresponding path program 4 times [2020-10-27 14:57:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:35,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441651381] [2020-10-27 14:57:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:35,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:35,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:36,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:37,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:57:37,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:57:37,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1477 [2020-10-27 14:57:37,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:57:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:57:37,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:37,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:37,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:37,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:37,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:37,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:37,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:57:37,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:37,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:37,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 14:57:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:37,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:37,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:37,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:37,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:37,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:57:37,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:37,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:37,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:37,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:57:37,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:37,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:57:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:37,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:37,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:37,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:37,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:57:37,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:37,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:37,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:37,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:57:37,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:57:37,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441651381] [2020-10-27 14:57:37,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:37,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:57:37,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796419777] [2020-10-27 14:57:37,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:57:37,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:37,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:57:37,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:57:37,273 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 13 states. [2020-10-27 14:57:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:37,992 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-27 14:57:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:57:37,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-27 14:57:37,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:37,995 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:57:37,995 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 14:57:37,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:57:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 14:57:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2020-10-27 14:57:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:57:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-27 14:57:38,010 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 43 [2020-10-27 14:57:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:38,010 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-27 14:57:38,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:57:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-27 14:57:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:57:38,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:38,012 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:38,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:57:38,012 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1887213235, now seen corresponding path program 5 times [2020-10-27 14:57:38,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:38,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957368398] [2020-10-27 14:57:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:38,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:38,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:39,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:39,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:57:39,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:57:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1536 [2020-10-27 14:57:39,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:57:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:57:39,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:39,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:39,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:39,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:39,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:39,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:39,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:57:39,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:39,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:39,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:39,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:39,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:39,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:57:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:39,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:39,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:39,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:39,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:57:39,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:39,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:39,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:39,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:57:39,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:57:39,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957368398] [2020-10-27 14:57:39,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:39,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:57:39,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089647056] [2020-10-27 14:57:39,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:57:39,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:39,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:57:39,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:57:39,938 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 16 states. [2020-10-27 14:57:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:40,673 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2020-10-27 14:57:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:57:40,674 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 14:57:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:40,675 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:57:40,675 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:57:40,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:57:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:57:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-10-27 14:57:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:57:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-27 14:57:40,708 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 43 [2020-10-27 14:57:40,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:40,708 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-27 14:57:40,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:57:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-27 14:57:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:57:40,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:40,713 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:40,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:57:40,714 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:40,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:40,715 INFO L82 PathProgramCache]: Analyzing trace with hash 578800955, now seen corresponding path program 6 times [2020-10-27 14:57:40,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:40,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123911580] [2020-10-27 14:57:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:40,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:40,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:40,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:40,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:41,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:42,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:42,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:44,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:44,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:57:44,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:57:44,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3726 [2020-10-27 14:57:44,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:44,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:57:44,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:44,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:57:44,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:45,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:45,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:45,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:45,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:45,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:45,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:57:45,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:45,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:45,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 14:57:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:45,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:45,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:45,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:45,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:45,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 14:57:45,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:57:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:57:45,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:57:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:45,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:45,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:45,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:45,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:45,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 14:57:45,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:45,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:57:45,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:57:45,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:45,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:57:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:45,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:45,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:45,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:45,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:45,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:57:45,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:45,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:57:45,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:45,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:57:45,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 14:57:45,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123911580] [2020-10-27 14:57:45,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:45,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:57:45,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507401817] [2020-10-27 14:57:45,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:57:45,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:45,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:57:45,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:57:45,383 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 21 states. [2020-10-27 14:57:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:46,736 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-27 14:57:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:57:46,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-27 14:57:46,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:46,738 INFO L225 Difference]: With dead ends: 100 [2020-10-27 14:57:46,738 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 14:57:46,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:57:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 14:57:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 14:57:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:57:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-27 14:57:46,751 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 51 [2020-10-27 14:57:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:46,751 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-27 14:57:46,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:57:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-27 14:57:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:57:46,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:46,753 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:46,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:57:46,753 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1046038436, now seen corresponding path program 7 times [2020-10-27 14:57:46,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:46,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857072398] [2020-10-27 14:57:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:46,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:46,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:47,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:47,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:50,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:50,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:57:50,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:57:50,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3957 [2020-10-27 14:57:50,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:50,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:57:50,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:50,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 14:57:50,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:51,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:51,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:51,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:51,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:51,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:51,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:57:51,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:51,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:57:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:51,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:51,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:51,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:51,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:51,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:57:51,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:51,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:51,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:51,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:57:51,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:51,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:57:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:51,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:51,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:51,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:51,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:51,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 14:57:51,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:51,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:57:51,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:51,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:57:51,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:57:52,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857072398] [2020-10-27 14:57:52,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:52,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:57:52,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186549570] [2020-10-27 14:57:52,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:57:52,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:52,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:57:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:57:52,054 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 23 states. [2020-10-27 14:57:53,225 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-27 14:57:53,459 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-27 14:57:53,645 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-27 14:57:53,809 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-27 14:57:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:57:54,672 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-10-27 14:57:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:57:54,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-27 14:57:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:57:54,679 INFO L225 Difference]: With dead ends: 87 [2020-10-27 14:57:54,679 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:57:54,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=382, Invalid=1970, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:57:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:57:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-27 14:57:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:57:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-27 14:57:54,704 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 51 [2020-10-27 14:57:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:57:54,706 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-27 14:57:54,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:57:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-27 14:57:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:57:54,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:57:54,711 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:57:54,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:57:54,711 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:57:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:57:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1883536288, now seen corresponding path program 8 times [2020-10-27 14:57:54,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:57:54,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990359477] [2020-10-27 14:57:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:57:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:54,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:54,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:55,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:55,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:55,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:55,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:57,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:57,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:57:57,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:57:57,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2731 [2020-10-27 14:57:57,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:57,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:57:57,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:57:57,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 14:57:57,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:58,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:57:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:58,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:58,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:58,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:57:58,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:58,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:57:58,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:58,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:57:58,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:58,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:57:58,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:58,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 14:57:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:58,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:58,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:58,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:58,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:58,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:57:58,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:57:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:57:58,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:58,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:57:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:58,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:58,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:58,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:58,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:58,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:57:58,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:57:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:57:58,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:58,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 14:57:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:57:58,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:57:58,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:57:58,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:57:58,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:57:58,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:57:58,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:57:58,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:57:58,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:57:58,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:57:58,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:57:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:57:58,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990359477] [2020-10-27 14:57:58,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:57:58,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:57:58,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044977621] [2020-10-27 14:57:58,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:57:58,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:57:58,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:57:58,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:57:58,692 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 25 states. [2020-10-27 14:58:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:58:02,225 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2020-10-27 14:58:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 14:58:02,226 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-27 14:58:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:58:02,227 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:58:02,227 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 14:58:02,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=594, Invalid=3066, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 14:58:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 14:58:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-10-27 14:58:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:58:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-27 14:58:02,239 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2020-10-27 14:58:02,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:58:02,239 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-27 14:58:02,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:58:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-27 14:58:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:58:02,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:58:02,240 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:58:02,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:58:02,240 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:58:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:58:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash -62054139, now seen corresponding path program 9 times [2020-10-27 14:58:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:58:02,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983406756] [2020-10-27 14:58:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:58:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:02,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:02,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:02,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:02,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:03,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:05,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:05,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:07,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:07,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:58:07,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:58:07,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:58:07,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:07,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:58:07,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:58:07,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:58:07,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:08,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:58:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:08,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:08,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:08,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:58:08,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:08,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:58:08,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:58:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:58:08,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:08,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:58:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:08,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:08,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:08,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:08,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:08,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:58:08,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:08,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:08,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:08,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:08,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:08,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:58:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:08,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:08,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:08,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:08,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:58:08,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:58:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:08,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:58:08,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:08,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:58:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:08,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:08,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:08,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:08,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:08,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:58:08,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:08,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:08,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:08,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:08,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:58:08,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983406756] [2020-10-27 14:58:08,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:58:08,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:58:08,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538439387] [2020-10-27 14:58:08,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:58:08,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:58:08,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:58:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:58:08,222 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 23 states. [2020-10-27 14:58:09,263 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-27 14:58:09,514 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 14:58:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:58:11,982 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2020-10-27 14:58:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 14:58:11,983 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-27 14:58:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:58:11,985 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:58:11,985 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 14:58:11,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=543, Invalid=3617, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 14:58:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 14:58:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-27 14:58:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:58:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-27 14:58:12,003 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 59 [2020-10-27 14:58:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:58:12,004 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-27 14:58:12,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:58:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-27 14:58:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:58:12,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:58:12,005 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:58:12,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:58:12,006 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:58:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:58:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1472586538, now seen corresponding path program 10 times [2020-10-27 14:58:12,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:58:12,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054234650] [2020-10-27 14:58:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:58:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:12,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:12,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:12,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:13,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:14,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:14,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:16,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:16,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:17,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:17,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:58:17,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:58:17,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:58:17,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:17,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:58:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:58:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:58:17,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:17,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:58:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:17,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:17,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:17,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:58:17,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:17,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:58:17,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:58:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:58:17,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:17,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:58:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:17,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:17,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:17,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:17,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:17,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:58:17,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:17,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:17,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:17,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:17,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:17,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 14:58:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:17,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:17,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:17,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:17,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:17,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:58:17,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:17,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:17,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:17,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:17,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-27 14:58:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:17,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:17,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:17,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:17,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:17,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:58:17,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:17,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:17,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:17,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:17,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 14:58:17,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054234650] [2020-10-27 14:58:17,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:58:17,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:58:17,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524019010] [2020-10-27 14:58:17,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:58:17,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:58:17,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:58:17,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:58:17,452 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 18 states. [2020-10-27 14:58:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:58:18,893 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-10-27 14:58:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:58:18,894 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2020-10-27 14:58:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:58:18,896 INFO L225 Difference]: With dead ends: 129 [2020-10-27 14:58:18,896 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:58:18,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:58:18,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:58:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 90. [2020-10-27 14:58:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 14:58:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-10-27 14:58:18,917 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 63 [2020-10-27 14:58:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:58:18,917 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-10-27 14:58:18,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:58:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-10-27 14:58:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:58:18,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:58:18,918 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:58:18,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:58:18,919 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:58:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:58:18,919 INFO L82 PathProgramCache]: Analyzing trace with hash -549924690, now seen corresponding path program 11 times [2020-10-27 14:58:18,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:58:18,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637997118] [2020-10-27 14:58:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:58:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:18,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:19,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:19,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:20,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:20,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:21,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:22,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:22,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:23,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:23,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:23,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:58:23,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:58:23,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:58:23,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:23,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:58:23,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:58:23,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 14:58:23,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:25,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:58:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:25,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:25,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:25,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:58:25,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:25,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:58:25,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:58:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:58:25,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:25,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:58:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:25,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:25,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:25,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:25,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:25,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:58:25,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:25,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:25,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:25,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:58:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:25,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:25,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:25,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:25,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:25,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:58:25,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:58:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:58:25,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:25,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:58:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:25,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:25,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:25,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:25,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:25,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:58:25,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:58:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:25,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:58:25,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:25,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:58:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:25,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:25,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:25,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:25,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:25,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:58:25,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:25,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:25,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:25,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 73 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:58:25,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637997118] [2020-10-27 14:58:25,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:58:25,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:58:25,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467489339] [2020-10-27 14:58:25,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:58:25,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:58:25,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:58:25,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:58:25,808 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 27 states. [2020-10-27 14:58:26,144 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-27 14:58:27,359 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-27 14:58:29,425 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 14:58:29,832 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-27 14:58:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:58:29,946 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-10-27 14:58:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:58:29,947 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-10-27 14:58:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:58:29,949 INFO L225 Difference]: With dead ends: 121 [2020-10-27 14:58:29,949 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:58:29,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=551, Invalid=3109, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 14:58:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:58:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-27 14:58:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 14:58:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-27 14:58:29,964 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 67 [2020-10-27 14:58:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:58:29,964 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-27 14:58:29,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:58:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-27 14:58:29,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:58:29,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:58:29,965 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:58:29,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:58:29,966 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:58:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:58:29,966 INFO L82 PathProgramCache]: Analyzing trace with hash -417920305, now seen corresponding path program 12 times [2020-10-27 14:58:29,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:58:29,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642516473] [2020-10-27 14:58:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:58:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:29,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:30,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:30,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:31,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:32,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:32,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:33,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:33,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:33,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:34,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:34,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:58:34,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:58:34,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:58:34,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:34,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:58:34,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:58:34,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 14:58:34,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:35,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:58:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:35,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:35,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:35,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:58:35,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:35,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:58:35,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:58:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:35,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:58:35,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:35,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:58:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:35,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:35,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:35,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:35,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:35,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:58:35,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:35,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:35,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:35,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:35,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:35,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:58:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:35,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:35,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:35,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:35,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:35,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:58:35,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:35,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:35,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:35,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:35,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:35,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:58:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:35,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:35,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:35,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:35,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:35,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:58:35,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:35,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:35,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:35,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:58:35,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642516473] [2020-10-27 14:58:35,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:58:35,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:58:35,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073883834] [2020-10-27 14:58:35,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:58:35,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:58:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:58:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:58:35,587 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 20 states. [2020-10-27 14:58:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:58:37,125 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-10-27 14:58:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:58:37,126 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-10-27 14:58:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:58:37,128 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:58:37,128 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 14:58:37,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:58:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 14:58:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 72. [2020-10-27 14:58:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:58:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-27 14:58:37,142 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 67 [2020-10-27 14:58:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:58:37,142 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-27 14:58:37,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:58:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-27 14:58:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:58:37,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:58:37,143 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:58:37,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:58:37,144 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:58:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:58:37,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1934385709, now seen corresponding path program 13 times [2020-10-27 14:58:37,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:58:37,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848919052] [2020-10-27 14:58:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:58:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:37,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:37,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:39,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:39,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:39,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:40,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:40,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:40,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:41,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:42,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:42,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:58:42,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:58:42,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:58:42,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:58:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:58:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 14:58:42,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:42,982 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-27 14:58:43,123 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-27 14:58:43,282 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-27 14:58:43,684 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-27 14:58:43,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:58:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:43,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:43,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:43,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:58:43,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:43,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:58:43,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:43,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:58:43,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:43,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:58:43,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:43,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:58:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:43,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:43,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:43,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:43,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:43,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:58:43,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:43,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:43,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 14:58:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:43,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:43,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:43,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:43,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:58:43,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:58:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:58:43,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:43,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-27 14:58:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:44,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:44,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:44,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:44,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:44,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:58:44,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:44,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:44,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:44,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:44,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:44,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 14:58:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:44,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:44,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:44,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:44,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:44,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:58:44,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:44,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:44,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:44,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:44,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:58:44,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848919052] [2020-10-27 14:58:44,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:58:44,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:58:44,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325383048] [2020-10-27 14:58:44,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:58:44,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:58:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:58:44,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:58:44,054 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 25 states. [2020-10-27 14:58:44,233 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-27 14:58:44,980 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-27 14:58:45,288 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2020-10-27 14:58:46,279 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-27 14:58:46,517 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-27 14:58:46,780 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 54 [2020-10-27 14:58:46,999 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 51 [2020-10-27 14:58:47,207 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2020-10-27 14:58:47,459 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 51 [2020-10-27 14:58:48,064 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-27 14:58:48,333 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-27 14:58:48,852 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-27 14:58:49,293 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-10-27 14:58:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:58:49,740 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-10-27 14:58:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:58:49,741 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2020-10-27 14:58:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:58:49,743 INFO L225 Difference]: With dead ends: 117 [2020-10-27 14:58:49,744 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:58:49,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=500, Invalid=2922, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 14:58:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:58:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2020-10-27 14:58:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:58:49,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-27 14:58:49,759 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2020-10-27 14:58:49,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:58:49,759 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-27 14:58:49,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:58:49,759 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-27 14:58:49,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:58:49,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:58:49,760 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:58:49,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:58:49,761 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:58:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:58:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash 940134520, now seen corresponding path program 14 times [2020-10-27 14:58:49,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:58:49,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678850954] [2020-10-27 14:58:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:58:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:49,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:49,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:50,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:50,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:50,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:51,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:51,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:51,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:52,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:52,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:52,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:53,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:53,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:53,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:54,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:54,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:58:54,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:58:54,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:58:54,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:58:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:58:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:58:54,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:55,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:58:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:55,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:55,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:55,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:58:55,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:55,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:58:55,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:58:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:58:55,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:55,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:58:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:55,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:55,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:55,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:55,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:55,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:58:55,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:55,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:55,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:55,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:55,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:55,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:58:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:55,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:55,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:55,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:55,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:55,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:58:55,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:55,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:55,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:55,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:55,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:55,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:58:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:55,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:55,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:55,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:55,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:55,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:58:55,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:55,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:55,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:55,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:55,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:58:55,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:58:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:55,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:55,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:58:55,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:58:55,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:58:55,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:58:55,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:58:55,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:58:55,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:58:55,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:58:55,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:58:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:58:55,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678850954] [2020-10-27 14:58:55,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:58:55,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:58:55,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018188939] [2020-10-27 14:58:55,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:58:55,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:58:55,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:58:55,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:58:55,403 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 20 states. [2020-10-27 14:58:57,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:58:57,383 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2020-10-27 14:58:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:58:57,384 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-10-27 14:58:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:58:57,386 INFO L225 Difference]: With dead ends: 125 [2020-10-27 14:58:57,386 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 14:58:57,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:58:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 14:58:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-27 14:58:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 14:58:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2020-10-27 14:58:57,407 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 75 [2020-10-27 14:58:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:58:57,408 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2020-10-27 14:58:57,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:58:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2020-10-27 14:58:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:58:57,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:58:57,409 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:58:57,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:58:57,410 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:58:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:58:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash 105588893, now seen corresponding path program 15 times [2020-10-27 14:58:57,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:58:57,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673723648] [2020-10-27 14:58:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:58:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:58:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:57,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:58:59,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:00,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:00,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:01,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:01,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:02,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:02,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:02,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:59:02,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:59:02,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 14:59:02,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:02,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:59:02,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:02,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 14:59:02,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:04,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:04,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:04,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:04,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:04,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:04,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:04,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:04,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:04,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:04,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:04,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:04,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 14:59:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:04,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:04,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:04,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:04,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:04,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:04,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:04,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-27 14:59:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:04,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:04,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:04,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:04,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:04,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:04,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 14:59:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:04,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:04,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:04,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:04,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:04,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:04,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:04,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:04,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:04,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:04,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:59:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:04,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:04,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:04,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:04,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:04,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:59:04,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:04,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:59:04,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:04,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:59:04,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 17 proven. 150 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-27 14:59:04,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673723648] [2020-10-27 14:59:04,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:04,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:59:04,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101343196] [2020-10-27 14:59:04,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:59:04,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:04,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:59:04,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:59:04,241 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand 29 states. [2020-10-27 14:59:05,847 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 14:59:06,049 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-27 14:59:06,307 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-27 14:59:06,530 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-27 14:59:06,760 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-27 14:59:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:08,766 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2020-10-27 14:59:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:59:08,766 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-10-27 14:59:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:08,768 INFO L225 Difference]: With dead ends: 117 [2020-10-27 14:59:08,768 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 14:59:08,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=663, Invalid=3759, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 14:59:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 14:59:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2020-10-27 14:59:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 14:59:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-10-27 14:59:08,788 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 79 [2020-10-27 14:59:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:08,788 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-10-27 14:59:08,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:59:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-10-27 14:59:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:59:08,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:08,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:59:08,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:59:08,790 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash -904667871, now seen corresponding path program 16 times [2020-10-27 14:59:08,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:08,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707619341] [2020-10-27 14:59:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:08,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:09,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:09,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:09,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:09,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:10,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:10,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:11,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:11,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:12,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:12,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:13,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:13,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:59:13,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:59:13,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:59:13,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:13,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:59:13,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:13,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 14:59:13,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:16,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:16,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:16,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:16,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:16,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:16,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:16,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:16,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:16,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:16,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:59:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:16,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:16,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:16,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:16,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:16,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:16,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:16,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:16,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:59:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:16,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:16,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:16,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:16,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:16,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:59:16,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:16,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:59:16,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:16,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:59:16,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:16,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:59:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:16,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:16,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:16,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:16,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:16,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:59:16,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:16,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:59:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:16,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:59:16,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:16,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:59:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:16,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:16,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:16,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:16,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:16,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:59:16,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:16,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:16,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:16,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:16,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:16,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 14:59:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:16,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:16,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:16,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:16,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:16,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:16,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:16,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:16,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:16,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 14 proven. 154 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-27 14:59:16,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707619341] [2020-10-27 14:59:16,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:16,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:59:16,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234759259] [2020-10-27 14:59:16,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:59:16,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:16,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:59:16,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:59:16,354 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 30 states. [2020-10-27 14:59:16,877 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-27 14:59:18,956 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-27 14:59:19,351 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 14:59:19,617 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 14:59:19,954 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 14:59:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:23,657 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2020-10-27 14:59:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 14:59:23,658 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-10-27 14:59:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:23,660 INFO L225 Difference]: With dead ends: 121 [2020-10-27 14:59:23,660 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 14:59:23,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=817, Invalid=5035, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 14:59:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 14:59:23,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-27 14:59:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 14:59:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2020-10-27 14:59:23,689 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 83 [2020-10-27 14:59:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:23,690 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2020-10-27 14:59:23,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:59:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2020-10-27 14:59:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:59:23,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:23,692 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:59:23,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:59:23,692 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:23,693 INFO L82 PathProgramCache]: Analyzing trace with hash -20278, now seen corresponding path program 17 times [2020-10-27 14:59:23,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:23,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954446471] [2020-10-27 14:59:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:23,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:23,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:24,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:24,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:25,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:25,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:26,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:28,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:28,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:59:28,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:59:28,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:59:28,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:28,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:59:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:28,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 14:59:28,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:30,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:30,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:30,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:30,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:30,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:30,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:30,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:30,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:30,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:30,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:30,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:30,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:59:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:30,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:30,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:30,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:30,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:30,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:30,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:30,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:30,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:30,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:30,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:30,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:59:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:30,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:30,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:30,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:30,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:30,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:59:30,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:30,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:59:30,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:30,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:59:30,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:31,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:59:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:31,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:31,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:31,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:31,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:31,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:59:31,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:31,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:31,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:31,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:31,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:31,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:59:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:31,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:31,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:31,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:31,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:31,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:31,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:31,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:31,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:31,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 14:59:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:31,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:31,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:31,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:31,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:31,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:31,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:31,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:31,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:31,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:31,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:31,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 14:59:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:31,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:31,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:31,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:31,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:31,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:31,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:31,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:31,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:31,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:31,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 72 proven. 118 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 14:59:31,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954446471] [2020-10-27 14:59:31,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:31,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:59:31,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464598254] [2020-10-27 14:59:31,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:59:31,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:31,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:59:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:59:31,133 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 28 states. [2020-10-27 14:59:32,023 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-27 14:59:34,482 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-27 14:59:34,647 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-27 14:59:35,397 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-27 14:59:36,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:36,083 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2020-10-27 14:59:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 14:59:36,085 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-10-27 14:59:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:36,090 INFO L225 Difference]: With dead ends: 143 [2020-10-27 14:59:36,090 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:59:36,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=576, Invalid=3330, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 14:59:36,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:59:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2020-10-27 14:59:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:59:36,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-27 14:59:36,117 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 91 [2020-10-27 14:59:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:36,117 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-27 14:59:36,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:59:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-27 14:59:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:59:36,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:36,120 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:59:36,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:59:36,120 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash 673095407, now seen corresponding path program 18 times [2020-10-27 14:59:36,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:36,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518727630] [2020-10-27 14:59:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:36,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:36,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:37,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:38,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:39,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:40,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:40,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:41,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:41,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 14:59:41,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:59:41,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:59:41,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:59:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:59:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:59:41,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:43,015 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-27 14:59:43,166 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-27 14:59:43,349 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-27 14:59:44,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:59:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:59:44,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:59:44,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:59:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:59:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 14:59:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:44,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:59:44,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:44,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-27 14:59:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:44,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:59:44,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:59:44,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:44,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:59:44,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 14:59:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:44,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:59:44,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:59:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:59:44,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:59:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:44,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:59:44,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:44,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-27 14:59:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:44,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:59:44,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:44,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:44,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:44,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 14:59:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:44,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:44,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:59:44,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:59:44,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:59:44,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:59:44,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:59:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:59:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:59:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:59:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:59:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 16 proven. 212 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:59:44,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518727630] [2020-10-27 14:59:44,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:59:44,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:59:44,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026488292] [2020-10-27 14:59:44,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:59:44,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:59:44,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:59:44,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:59:44,574 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 33 states. [2020-10-27 14:59:45,368 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-10-27 14:59:46,016 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-27 14:59:46,667 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-27 14:59:47,311 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 14:59:48,010 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-27 14:59:48,728 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-27 14:59:49,430 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-27 14:59:50,495 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 14:59:50,885 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-27 14:59:51,487 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-10-27 14:59:51,877 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-27 14:59:52,310 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-10-27 14:59:53,360 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-27 14:59:53,573 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 14:59:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:59:57,111 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2020-10-27 14:59:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-27 14:59:57,114 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 95 [2020-10-27 14:59:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:59:57,115 INFO L225 Difference]: With dead ends: 139 [2020-10-27 14:59:57,115 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:59:57,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1030, Invalid=8090, Unknown=0, NotChecked=0, Total=9120 [2020-10-27 14:59:57,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:59:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2020-10-27 14:59:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 14:59:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2020-10-27 14:59:57,139 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 95 [2020-10-27 14:59:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:59:57,140 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2020-10-27 14:59:57,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:59:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2020-10-27 14:59:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:59:57,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:59:57,142 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:59:57,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:59:57,142 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:59:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:59:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash 757068436, now seen corresponding path program 19 times [2020-10-27 14:59:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:59:57,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876836848] [2020-10-27 14:59:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:59:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:59:57,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:57,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:57,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:58,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:59,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:59:59,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:02,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:02,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 15:00:02,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 15:00:02,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 15:00:02,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 15:00:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 15:00:02,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:03,126 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2020-10-27 15:00:03,315 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2020-10-27 15:00:03,568 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2020-10-27 15:00:03,851 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2020-10-27 15:00:04,161 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2020-10-27 15:00:04,418 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2020-10-27 15:00:04,686 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2020-10-27 15:00:04,914 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-27 15:00:05,405 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 28 [2020-10-27 15:00:05,600 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2020-10-27 15:00:05,810 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 42 [2020-10-27 15:00:06,037 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-10-27 15:00:06,230 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-10-27 15:00:06,462 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-10-27 15:00:06,785 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 37 [2020-10-27 15:00:08,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:08,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:08,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:08,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 15:00:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:08,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:00:08,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 15:00:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:08,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 15:00:08,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 15:00:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:00:08,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 15:00:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:08,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:00:08,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 15:00:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:00:08,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 15:00:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:08,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:08,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 15:00:08,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:00:08,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 15:00:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:08,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:08,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:08,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-27 15:00:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:08,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:08,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:08,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:08,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:08,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:08,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:08,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:08,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:08,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:08,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 18 proven. 245 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-27 15:00:08,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876836848] [2020-10-27 15:00:08,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:08,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 15:00:08,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895045914] [2020-10-27 15:00:08,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 15:00:08,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:08,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 15:00:08,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 15:00:08,749 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand 38 states. [2020-10-27 15:00:09,447 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-27 15:00:09,876 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 15:00:10,069 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-27 15:00:10,341 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-27 15:00:10,661 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-27 15:00:10,899 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 15:00:11,154 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-27 15:00:11,449 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-27 15:00:11,733 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 15:00:11,975 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-27 15:00:12,263 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-27 15:00:12,544 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-27 15:00:12,801 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-27 15:00:13,097 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-27 15:00:13,361 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 15:00:14,276 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 81 [2020-10-27 15:00:15,100 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 84 [2020-10-27 15:00:15,816 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2020-10-27 15:00:16,421 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 81 [2020-10-27 15:00:17,145 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 77 [2020-10-27 15:00:18,023 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 80 [2020-10-27 15:00:19,112 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-10-27 15:00:19,720 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-27 15:00:20,251 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-10-27 15:00:20,695 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-10-27 15:00:21,107 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-27 15:00:21,628 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-10-27 15:00:22,144 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-10-27 15:00:22,546 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-27 15:00:25,506 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-27 15:00:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:26,493 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2020-10-27 15:00:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 15:00:26,494 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 99 [2020-10-27 15:00:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:26,495 INFO L225 Difference]: With dead ends: 141 [2020-10-27 15:00:26,495 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 15:00:26,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 15 SyntacticMatches, 10 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=1120, Invalid=8582, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 15:00:26,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 15:00:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-10-27 15:00:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 15:00:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-27 15:00:26,519 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 99 [2020-10-27 15:00:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:26,519 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-27 15:00:26,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 15:00:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-27 15:00:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 15:00:26,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:26,521 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:26,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 15:00:26,521 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:26,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1697987432, now seen corresponding path program 20 times [2020-10-27 15:00:26,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:26,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883212498] [2020-10-27 15:00:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:26,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:26,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:26,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:27,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:28,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:28,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:29,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:30,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:30,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:30,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:31,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:31,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:31,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 15:00:31,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 15:00:31,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5140 [2020-10-27 15:00:31,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:31,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 15:00:31,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:31,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 15:00:31,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:34,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:34,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:34,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:34,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:34,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:34,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:34,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:34,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:34,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 15:00:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:34,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:34,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:34,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:34,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:34,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:34,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:34,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:34,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:34,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:34,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-27 15:00:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:34,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:34,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:34,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:34,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:00:34,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:34,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:34,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:34,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:34,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:34,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 15:00:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:34,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:34,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:34,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:34,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:34,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:34,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:34,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 15:00:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:34,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:34,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:34,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:34,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:34,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 15:00:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:34,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:00:34,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:34,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-27 15:00:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:34,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:34,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:34,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:34,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:00:34,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:34,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 15:00:34,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:34,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 15:00:34,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:34,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 15:00:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:34,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:34,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:34,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:34,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:34,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:34,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:34,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:34,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:34,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:34,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-27 15:00:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:34,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:34,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:34,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:34,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:34,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:34,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:34,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 86 proven. 176 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-27 15:00:34,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883212498] [2020-10-27 15:00:34,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:34,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 15:00:34,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998289477] [2020-10-27 15:00:34,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 15:00:34,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:34,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 15:00:34,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2020-10-27 15:00:34,601 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 32 states. [2020-10-27 15:00:34,812 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-27 15:00:36,079 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-27 15:00:37,733 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-27 15:00:38,135 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-27 15:00:39,010 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-27 15:00:40,419 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-27 15:00:42,714 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-27 15:00:43,089 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-27 15:00:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:43,963 INFO L93 Difference]: Finished difference Result 145 states and 158 transitions. [2020-10-27 15:00:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-27 15:00:43,965 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 103 [2020-10-27 15:00:43,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:43,967 INFO L225 Difference]: With dead ends: 145 [2020-10-27 15:00:43,967 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 15:00:43,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1017, Invalid=6815, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 15:00:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 15:00:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-10-27 15:00:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 15:00:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-10-27 15:00:43,986 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 103 [2020-10-27 15:00:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:43,986 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-10-27 15:00:43,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 15:00:43,987 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-10-27 15:00:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 15:00:43,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:43,988 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:43,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 15:00:43,988 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash -823876803, now seen corresponding path program 21 times [2020-10-27 15:00:43,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:43,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985325791] [2020-10-27 15:00:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:44,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:44,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:44,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:45,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:46,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:46,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:47,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 15:00:49,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 15:00:49,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 15:00:49,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 15:00:49,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 15:00:49,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 15:00:49,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:00:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:49,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:00:49,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:49,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:00:49,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:00:49,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:49,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:00:49,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 15:00:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:49,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:49,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:49,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:49,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:49,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:49,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:49,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 15:00:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:49,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:49,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:49,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:00:49,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:49,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:49,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:49,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 15:00:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:49,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:49,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:49,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 15:00:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:49,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:49,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:49,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:49,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:49,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:49,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:49,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 15:00:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:49,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:49,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:49,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:49,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-27 15:00:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:49,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:49,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 15:00:49,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-27 15:00:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:49,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:49,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:00:49,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:00:49,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:00:49,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 15:00:49,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:00:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:00:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:00:49,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 15:00:49,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:00:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 14 proven. 249 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-27 15:00:49,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985325791] [2020-10-27 15:00:49,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:00:49,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 15:00:49,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943926609] [2020-10-27 15:00:49,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 15:00:49,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:00:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 15:00:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 15:00:49,951 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 23 states. [2020-10-27 15:00:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:00:53,607 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2020-10-27 15:00:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 15:00:53,609 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2020-10-27 15:00:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:00:53,611 INFO L225 Difference]: With dead ends: 157 [2020-10-27 15:00:53,612 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 15:00:53,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=134, Invalid=1588, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 15:00:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 15:00:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 142. [2020-10-27 15:00:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 15:00:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2020-10-27 15:00:53,646 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 107 [2020-10-27 15:00:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:00:53,646 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2020-10-27 15:00:53,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 15:00:53,647 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2020-10-27 15:00:53,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 15:00:53,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:00:53,648 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 15:00:53,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 15:00:53,649 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:00:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:00:53,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1879791774, now seen corresponding path program 22 times [2020-10-27 15:00:53,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:00:53,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90617247] [2020-10-27 15:00:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:00:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:00:53,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:53,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:54,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:54,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:00:55,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking...