/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-examples/standard_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:26:41,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:26:41,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:26:41,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:26:41,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:26:41,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:26:41,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:26:41,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:26:41,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:26:41,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:26:41,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:26:41,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:26:41,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:26:41,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:26:41,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:26:41,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:26:41,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:26:41,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:26:41,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:26:41,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:26:41,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:26:41,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:26:41,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:26:41,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:26:41,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:26:41,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:26:41,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:26:41,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:26:41,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:26:41,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:26:41,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:26:41,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:26:41,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:26:41,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:26:41,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:26:41,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:26:41,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:26:41,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:26:41,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:26:41,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:26:41,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:26:41,425 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 14:26:41,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:26:41,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:26:41,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:26:41,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:26:41,489 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:26:41,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:26:41,490 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:26:41,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:26:41,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:26:41,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:26:41,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:26:41,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:26:41,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:26:41,503 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:26:41,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:26:41,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:26:41,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:26:41,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:26:41,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:26:41,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:26:41,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:26:41,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:26:41,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:26:41,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:26:41,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:26:41,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:26:41,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:26:41,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:26:41,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:26:41,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:26:41,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:26:41,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:26:41,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:26:41,991 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:26:41,992 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:26:41,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2020-10-27 14:26:42,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c74b2925e/63dd13479e324e1fb3c6b7903ac7dc4e/FLAG30e987419 [2020-10-27 14:26:42,721 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:26:42,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2020-10-27 14:26:42,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c74b2925e/63dd13479e324e1fb3c6b7903ac7dc4e/FLAG30e987419 [2020-10-27 14:26:43,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c74b2925e/63dd13479e324e1fb3c6b7903ac7dc4e [2020-10-27 14:26:43,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:26:43,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:26:43,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:43,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:26:43,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:26:43,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:43" (1/1) ... [2020-10-27 14:26:43,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183b7f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43, skipping insertion in model container [2020-10-27 14:26:43,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:43" (1/1) ... [2020-10-27 14:26:43,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:26:43,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:26:43,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:43,437 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:26:43,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:43,485 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:26:43,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43 WrapperNode [2020-10-27 14:26:43,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:43,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:26:43,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:26:43,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:26:43,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43" (1/1) ... [2020-10-27 14:26:43,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43" (1/1) ... [2020-10-27 14:26:43,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43" (1/1) ... [2020-10-27 14:26:43,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43" (1/1) ... [2020-10-27 14:26:43,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43" (1/1) ... [2020-10-27 14:26:43,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43" (1/1) ... [2020-10-27 14:26:43,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43" (1/1) ... [2020-10-27 14:26:43,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:26:43,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:26:43,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:26:43,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:26:43,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43" (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 14:26:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:26:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:26:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:26:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:26:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:26:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:26:43,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:26:43,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:26:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:26:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:26:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:26:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:26:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:26:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:26:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:26:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:26:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:26:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:26:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:26:44,177 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:26:44,178 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-27 14:26:44,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:44 BoogieIcfgContainer [2020-10-27 14:26:44,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:26:44,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:26:44,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:26:44,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:26:44,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:26:43" (1/3) ... [2020-10-27 14:26:44,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c61ff20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:44, skipping insertion in model container [2020-10-27 14:26:44,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:43" (2/3) ... [2020-10-27 14:26:44,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c61ff20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:44, skipping insertion in model container [2020-10-27 14:26:44,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:44" (3/3) ... [2020-10-27 14:26:44,216 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2020-10-27 14:26:44,248 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:26:44,257 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:26:44,278 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:26:44,316 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:26:44,317 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:26:44,317 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:26:44,317 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:26:44,317 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:26:44,317 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:26:44,318 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:26:44,318 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:26:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-27 14:26:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:26:44,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:44,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:44,347 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:44,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1430342186, now seen corresponding path program 1 times [2020-10-27 14:26:44,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:44,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146110598] [2020-10-27 14:26:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:44,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:44,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:45,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:49,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:49,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:26:49,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:26:49,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:26:49,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:49,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:26:49,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:26:49,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:26:49,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:26:49,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:49,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:49,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:49,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:49,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:49,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:26:49,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:49,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:49,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:49,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:49,700 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 14:26:49,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146110598] [2020-10-27 14:26:49,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:26:49,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:26:49,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431290260] [2020-10-27 14:26:49,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:26:49,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:26:49,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:49,729 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-27 14:26:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:49,932 INFO L93 Difference]: Finished difference Result 87 states and 147 transitions. [2020-10-27 14:26:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:26:49,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 14:26:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:49,943 INFO L225 Difference]: With dead ends: 87 [2020-10-27 14:26:49,944 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:26:49,947 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 14:26:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:26:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 14:26:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:26:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-27 14:26:49,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 31 [2020-10-27 14:26:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:49,998 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-27 14:26:49,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:26:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-27 14:26:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:26:50,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:50,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:50,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:26:50,001 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:50,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:50,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2143673916, now seen corresponding path program 1 times [2020-10-27 14:26:50,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:50,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499981921] [2020-10-27 14:26:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:50,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:52,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:26:55,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:26:55,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:26:55,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:26:55,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:26:55,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:26:55,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:55,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:55,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:55,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:55,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:26:55,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:55,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:55,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 14:26:55,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499981921] [2020-10-27 14:26:55,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:55,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:26:55,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618600585] [2020-10-27 14:26:55,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:26:55,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:55,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:26:55,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:26:55,149 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 5 states. [2020-10-27 14:26:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:55,518 INFO L93 Difference]: Finished difference Result 91 states and 117 transitions. [2020-10-27 14:26:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:26:55,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-10-27 14:26:55,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:55,520 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:26:55,520 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 14:26:55,524 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 14:26:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 14:26:55,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 14:26:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:26:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-10-27 14:26:55,552 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 40 [2020-10-27 14:26:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:55,553 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-10-27 14:26:55,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:26:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-10-27 14:26:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:26:55,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:55,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:55,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:26:55,561 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:55,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1385563250, now seen corresponding path program 2 times [2020-10-27 14:26:55,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:55,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726057430] [2020-10-27 14:26:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:55,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:58,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:00,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:27:00,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:27:00,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:27:00,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:00,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:27:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:27:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:27:00,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:00,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:00,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:00,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:00,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:00,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:00,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 14:27:00,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726057430] [2020-10-27 14:27:00,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:00,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:27:00,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852788264] [2020-10-27 14:27:00,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:27:00,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:27:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:27:00,752 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 6 states. [2020-10-27 14:27:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:00,973 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2020-10-27 14:27:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:27:00,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-27 14:27:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:00,975 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:27:00,975 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:27:00,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:27:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:27:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 14:27:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:27:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2020-10-27 14:27:00,987 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 49 [2020-10-27 14:27:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:00,988 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2020-10-27 14:27:00,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:27:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2020-10-27 14:27:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:27:00,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:00,990 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:00,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:27:00,991 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:00,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1838870524, now seen corresponding path program 3 times [2020-10-27 14:27:00,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:00,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526700966] [2020-10-27 14:27:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:06,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:27:06,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:27:06,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:27:06,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:27:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:27:06,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:27:06,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 14:27:06,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:06,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:06,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:06,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:06,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:27:06,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:06,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:06,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-27 14:27:06,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526700966] [2020-10-27 14:27:06,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:06,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:27:06,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623648638] [2020-10-27 14:27:06,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:27:06,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:06,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:27:06,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:27:06,170 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 7 states. [2020-10-27 14:27:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:06,405 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2020-10-27 14:27:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:27:06,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-27 14:27:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:06,407 INFO L225 Difference]: With dead ends: 125 [2020-10-27 14:27:06,407 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:27:06,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:27:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:27:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 14:27:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:27:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-10-27 14:27:06,419 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 58 [2020-10-27 14:27:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:06,419 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-10-27 14:27:06,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:27:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-10-27 14:27:06,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:27:06,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:06,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:06,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:27:06,422 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:06,423 INFO L82 PathProgramCache]: Analyzing trace with hash -632270770, now seen corresponding path program 4 times [2020-10-27 14:27:06,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:06,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881117565] [2020-10-27 14:27:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:06,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:07,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:11,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:27:11,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:27:11,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:27:11,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:11,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:27:11,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:27:11,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:11,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:27:11,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:11,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:11,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:11,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:11,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:11,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:11,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:11,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:11,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:11,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-27 14:27:11,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881117565] [2020-10-27 14:27:11,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:11,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:27:11,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455803563] [2020-10-27 14:27:11,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:27:11,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:27:11,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:27:11,590 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 8 states. [2020-10-27 14:27:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:11,828 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2020-10-27 14:27:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:27:11,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-27 14:27:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:11,830 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:27:11,830 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:27:11,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:27:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:27:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 14:27:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:27:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-10-27 14:27:11,851 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 67 [2020-10-27 14:27:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:11,851 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-10-27 14:27:11,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:27:11,852 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-10-27 14:27:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 14:27:11,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:11,856 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:11,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:27:11,857 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:11,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1934823868, now seen corresponding path program 5 times [2020-10-27 14:27:11,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:11,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024632201] [2020-10-27 14:27:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:11,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:12,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:12,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:12,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:12,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:16,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:16,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:16,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 14:27:16,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:27:16,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:27:16,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:16,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:27:16,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:27:16,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:27:16,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:17,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:17,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:17,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:17,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:17,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:17,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:17,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:17,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:17,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:17,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-27 14:27:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024632201] [2020-10-27 14:27:17,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:17,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:27:17,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530356131] [2020-10-27 14:27:17,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:27:17,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:27:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:17,037 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 9 states. [2020-10-27 14:27:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:17,289 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2020-10-27 14:27:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:27:17,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 76 [2020-10-27 14:27:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:17,291 INFO L225 Difference]: With dead ends: 159 [2020-10-27 14:27:17,292 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:27:17,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:27:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-27 14:27:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 14:27:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-27 14:27:17,311 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 76 [2020-10-27 14:27:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:17,312 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-27 14:27:17,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:27:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-27 14:27:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:27:17,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:17,315 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:17,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:27:17,319 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:17,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1825781006, now seen corresponding path program 6 times [2020-10-27 14:27:17,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:17,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648420489] [2020-10-27 14:27:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:17,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:17,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:22,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:27:22,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:22,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:27:22,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:22,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:27:22,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:27:22,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:27:22,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:22,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:22,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:22,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:22,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:22,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:22,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:22,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-27 14:27:22,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648420489] [2020-10-27 14:27:22,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:22,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:27:22,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742122132] [2020-10-27 14:27:22,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:27:22,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:22,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:27:22,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:22,516 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 10 states. [2020-10-27 14:27:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:22,802 INFO L93 Difference]: Finished difference Result 176 states and 202 transitions. [2020-10-27 14:27:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:27:22,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2020-10-27 14:27:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:22,803 INFO L225 Difference]: With dead ends: 176 [2020-10-27 14:27:22,804 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 14:27:22,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 14:27:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-27 14:27:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 14:27:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2020-10-27 14:27:22,817 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 85 [2020-10-27 14:27:22,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:22,817 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2020-10-27 14:27:22,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:27:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2020-10-27 14:27:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 14:27:22,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:22,819 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:22,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:27:22,819 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:22,820 INFO L82 PathProgramCache]: Analyzing trace with hash -773997436, now seen corresponding path program 7 times [2020-10-27 14:27:22,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:22,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709423044] [2020-10-27 14:27:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:22,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:22,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:23,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:23,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:27,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:27,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 14:27:27,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:27,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:27:27,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:27:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 14:27:27,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:27:27,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:27,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:27,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:27,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:27,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:27,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:27,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:27,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:27,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:27,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:27,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:27,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:27:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-27 14:27:28,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709423044] [2020-10-27 14:27:28,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:28,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:27:28,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370397136] [2020-10-27 14:27:28,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:27:28,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:27:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:28,020 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand 11 states. [2020-10-27 14:27:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:28,364 INFO L93 Difference]: Finished difference Result 193 states and 219 transitions. [2020-10-27 14:27:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:27:28,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2020-10-27 14:27:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:28,365 INFO L225 Difference]: With dead ends: 193 [2020-10-27 14:27:28,366 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 14:27:28,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 14:27:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-27 14:27:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 14:27:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2020-10-27 14:27:28,386 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 94 [2020-10-27 14:27:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:28,387 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2020-10-27 14:27:28,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:27:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2020-10-27 14:27:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 14:27:28,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:28,390 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:28,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:27:28,394 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:28,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:28,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1478928846, now seen corresponding path program 8 times [2020-10-27 14:27:28,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:28,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654801350] [2020-10-27 14:27:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:28,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:28,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:33,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:27:33,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:33,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:27:33,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:33,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:27:33,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:27:33,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:27:33,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:33,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:33,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:33,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:33,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:33,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:33,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:33,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:33,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:33,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:33,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:33,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-27 14:27:33,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654801350] [2020-10-27 14:27:33,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:33,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:27:33,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318550215] [2020-10-27 14:27:33,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:27:33,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:33,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:27:33,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:33,608 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand 12 states. [2020-10-27 14:27:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:33,967 INFO L93 Difference]: Finished difference Result 210 states and 236 transitions. [2020-10-27 14:27:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:27:33,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 103 [2020-10-27 14:27:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:33,969 INFO L225 Difference]: With dead ends: 210 [2020-10-27 14:27:33,969 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 14:27:33,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 14:27:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-27 14:27:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 14:27:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2020-10-27 14:27:33,994 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 103 [2020-10-27 14:27:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:33,994 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2020-10-27 14:27:33,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:27:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2020-10-27 14:27:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 14:27:33,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:33,996 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:33,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:27:33,996 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:33,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:33,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1875081924, now seen corresponding path program 9 times [2020-10-27 14:27:33,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:34,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034307176] [2020-10-27 14:27:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:34,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:34,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:39,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 14:27:39,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:39,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:27:39,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:39,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:27:39,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-27 14:27:39,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:27:39,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:39,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:39,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:39,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:39,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:39,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:39,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:39,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:39,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:39,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:39,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-27 14:27:39,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034307176] [2020-10-27 14:27:39,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:39,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:27:39,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909772226] [2020-10-27 14:27:39,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:27:39,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:27:39,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:39,229 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand 13 states. [2020-10-27 14:27:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:39,596 INFO L93 Difference]: Finished difference Result 227 states and 253 transitions. [2020-10-27 14:27:39,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:27:39,597 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 112 [2020-10-27 14:27:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:39,598 INFO L225 Difference]: With dead ends: 227 [2020-10-27 14:27:39,598 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:27:39,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:27:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-27 14:27:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 14:27:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-10-27 14:27:39,611 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 112 [2020-10-27 14:27:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:39,612 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-10-27 14:27:39,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:27:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-10-27 14:27:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 14:27:39,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:39,613 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:39,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:27:39,614 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:39,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:39,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1535201650, now seen corresponding path program 10 times [2020-10-27 14:27:39,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:39,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702045499] [2020-10-27 14:27:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:39,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:39,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:40,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:44,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 14:27:44,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:44,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:27:44,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:44,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:27:44,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:27:44,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:27:44,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:44,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:44,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:44,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:44,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:44,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:44,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:44,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-27 14:27:44,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702045499] [2020-10-27 14:27:44,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:44,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:27:44,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847579903] [2020-10-27 14:27:44,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:27:44,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:44,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:27:44,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:44,833 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 14 states. [2020-10-27 14:27:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:45,224 INFO L93 Difference]: Finished difference Result 244 states and 270 transitions. [2020-10-27 14:27:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:27:45,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 121 [2020-10-27 14:27:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:45,226 INFO L225 Difference]: With dead ends: 244 [2020-10-27 14:27:45,226 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 14:27:45,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 14:27:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-27 14:27:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 14:27:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2020-10-27 14:27:45,246 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 121 [2020-10-27 14:27:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:45,247 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2020-10-27 14:27:45,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:27:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2020-10-27 14:27:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 14:27:45,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:45,252 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:45,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:27:45,252 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash -550885116, now seen corresponding path program 11 times [2020-10-27 14:27:45,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:45,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247407599] [2020-10-27 14:27:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:45,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 14:27:50,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:50,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:27:50,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:27:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-27 14:27:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:27:50,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:50,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:50,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:50,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:50,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:50,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:50,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-27 14:27:50,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247407599] [2020-10-27 14:27:50,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:50,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:27:50,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810918570] [2020-10-27 14:27:50,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:27:50,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:50,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:27:50,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:50,544 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand 15 states. [2020-10-27 14:27:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:51,027 INFO L93 Difference]: Finished difference Result 261 states and 287 transitions. [2020-10-27 14:27:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:27:51,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 130 [2020-10-27 14:27:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:51,030 INFO L225 Difference]: With dead ends: 261 [2020-10-27 14:27:51,030 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 14:27:51,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 14:27:51,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-27 14:27:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 14:27:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 153 transitions. [2020-10-27 14:27:51,040 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 153 transitions. Word has length 130 [2020-10-27 14:27:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:51,040 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 153 transitions. [2020-10-27 14:27:51,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:27:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 153 transitions. [2020-10-27 14:27:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 14:27:51,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:51,042 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:51,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:27:51,043 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:51,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1357954226, now seen corresponding path program 12 times [2020-10-27 14:27:51,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:51,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371243661] [2020-10-27 14:27:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:51,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:56,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 14:27:56,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:27:56,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:27:56,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:56,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:27:56,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 14:27:56,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:27:56,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:56,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:56,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:56,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:56,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:56,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:56,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:56,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:56,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2020-10-27 14:27:56,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371243661] [2020-10-27 14:27:56,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:56,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:27:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471082679] [2020-10-27 14:27:56,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:27:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:27:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:56,345 INFO L87 Difference]: Start difference. First operand 144 states and 153 transitions. Second operand 16 states. [2020-10-27 14:27:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:56,794 INFO L93 Difference]: Finished difference Result 278 states and 304 transitions. [2020-10-27 14:27:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:27:56,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 139 [2020-10-27 14:27:56,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:56,796 INFO L225 Difference]: With dead ends: 278 [2020-10-27 14:27:56,796 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 14:27:56,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 14:27:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-10-27 14:27:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 14:27:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 162 transitions. [2020-10-27 14:27:56,806 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 162 transitions. Word has length 139 [2020-10-27 14:27:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:56,807 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 162 transitions. [2020-10-27 14:27:56,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:27:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 162 transitions. [2020-10-27 14:27:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 14:27:56,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:56,808 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:56,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:27:56,809 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1008875708, now seen corresponding path program 13 times [2020-10-27 14:27:56,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:56,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377054523] [2020-10-27 14:27:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:57,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:57,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:57,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:01,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:01,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 14:28:01,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:28:01,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:28:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 14:28:01,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:28:01,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:02,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:02,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:02,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:02,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:02,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:02,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:02,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:02,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:02,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:02,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-27 14:28:02,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377054523] [2020-10-27 14:28:02,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:02,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:28:02,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874281573] [2020-10-27 14:28:02,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:28:02,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:02,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:28:02,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:28:02,114 INFO L87 Difference]: Start difference. First operand 153 states and 162 transitions. Second operand 17 states. [2020-10-27 14:28:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:02,553 INFO L93 Difference]: Finished difference Result 295 states and 321 transitions. [2020-10-27 14:28:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:28:02,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 148 [2020-10-27 14:28:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:02,555 INFO L225 Difference]: With dead ends: 295 [2020-10-27 14:28:02,555 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 14:28:02,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:28:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 14:28:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-27 14:28:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 14:28:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2020-10-27 14:28:02,578 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 148 [2020-10-27 14:28:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:02,578 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2020-10-27 14:28:02,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:28:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2020-10-27 14:28:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 14:28:02,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:02,582 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:02,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:28:02,583 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:02,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1779197966, now seen corresponding path program 14 times [2020-10-27 14:28:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:02,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388418709] [2020-10-27 14:28:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:02,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:02,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:03,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:07,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:07,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 14:28:07,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:07,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:28:07,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:28:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 14:28:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:28:07,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:07,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:07,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:07,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:07,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:07,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:07,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:07,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:07,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:07,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:07,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:07,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-27 14:28:07,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388418709] [2020-10-27 14:28:07,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:07,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:28:07,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208993121] [2020-10-27 14:28:07,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:28:07,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:28:07,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:28:07,934 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand 18 states. [2020-10-27 14:28:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:08,450 INFO L93 Difference]: Finished difference Result 312 states and 338 transitions. [2020-10-27 14:28:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:28:08,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 157 [2020-10-27 14:28:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:08,452 INFO L225 Difference]: With dead ends: 312 [2020-10-27 14:28:08,453 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 14:28:08,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:28:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 14:28:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-10-27 14:28:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 14:28:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 180 transitions. [2020-10-27 14:28:08,464 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 180 transitions. Word has length 157 [2020-10-27 14:28:08,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:08,464 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 180 transitions. [2020-10-27 14:28:08,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:28:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 180 transitions. [2020-10-27 14:28:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-27 14:28:08,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:08,467 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:08,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:28:08,467 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:08,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1398123132, now seen corresponding path program 15 times [2020-10-27 14:28:08,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:08,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919335790] [2020-10-27 14:28:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:08,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:08,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:13,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:13,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-27 14:28:13,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:13,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:28:13,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:13,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:28:13,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-27 14:28:13,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:28:13,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:13,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:13,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:13,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:13,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:13,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:13,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:13,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:13,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:13,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:13,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:13,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2020-10-27 14:28:13,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919335790] [2020-10-27 14:28:13,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:13,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:28:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382719459] [2020-10-27 14:28:13,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:28:13,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:13,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:28:13,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:28:13,838 INFO L87 Difference]: Start difference. First operand 171 states and 180 transitions. Second operand 19 states. [2020-10-27 14:28:14,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:14,423 INFO L93 Difference]: Finished difference Result 329 states and 355 transitions. [2020-10-27 14:28:14,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:28:14,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 166 [2020-10-27 14:28:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:14,426 INFO L225 Difference]: With dead ends: 329 [2020-10-27 14:28:14,426 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 14:28:14,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:28:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 14:28:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-27 14:28:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 14:28:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 189 transitions. [2020-10-27 14:28:14,437 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 189 transitions. Word has length 166 [2020-10-27 14:28:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:14,438 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 189 transitions. [2020-10-27 14:28:14,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:28:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 189 transitions. [2020-10-27 14:28:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 14:28:14,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:14,440 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:14,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:28:14,440 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:14,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:14,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1666573106, now seen corresponding path program 16 times [2020-10-27 14:28:14,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:14,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156494987] [2020-10-27 14:28:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:14,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:15,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:19,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:19,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 14:28:19,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:19,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:28:19,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:19,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:28:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 14:28:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:28:19,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:19,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:19,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:19,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:19,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:19,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:19,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:19,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:19,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:19,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:19,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2020-10-27 14:28:19,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156494987] [2020-10-27 14:28:19,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:19,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:28:19,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4633198] [2020-10-27 14:28:19,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:28:19,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:19,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:28:19,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:28:19,844 INFO L87 Difference]: Start difference. First operand 180 states and 189 transitions. Second operand 20 states. [2020-10-27 14:28:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:20,455 INFO L93 Difference]: Finished difference Result 346 states and 372 transitions. [2020-10-27 14:28:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:28:20,456 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 175 [2020-10-27 14:28:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:20,458 INFO L225 Difference]: With dead ends: 346 [2020-10-27 14:28:20,458 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 14:28:20,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:28:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 14:28:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-10-27 14:28:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 14:28:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 198 transitions. [2020-10-27 14:28:20,469 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 198 transitions. Word has length 175 [2020-10-27 14:28:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:20,470 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 198 transitions. [2020-10-27 14:28:20,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:28:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 198 transitions. [2020-10-27 14:28:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-27 14:28:20,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:20,472 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:20,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:28:20,473 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash -748956732, now seen corresponding path program 17 times [2020-10-27 14:28:20,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:20,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654625264] [2020-10-27 14:28:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:20,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:20,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:20,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:20,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:20,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:21,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:25,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:25,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 14:28:25,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:25,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:28:25,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:25,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:28:25,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 106 [2020-10-27 14:28:25,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:28:25,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:25,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:25,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:25,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:25,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:25,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:25,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:25,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:25,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2020-10-27 14:28:25,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654625264] [2020-10-27 14:28:25,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:25,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:28:25,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585871446] [2020-10-27 14:28:25,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:28:25,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:25,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:28:25,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:28:25,905 INFO L87 Difference]: Start difference. First operand 189 states and 198 transitions. Second operand 21 states. [2020-10-27 14:28:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:26,496 INFO L93 Difference]: Finished difference Result 363 states and 389 transitions. [2020-10-27 14:28:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:28:26,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 184 [2020-10-27 14:28:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:26,499 INFO L225 Difference]: With dead ends: 363 [2020-10-27 14:28:26,499 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 14:28:26,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:28:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 14:28:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-27 14:28:26,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 14:28:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 207 transitions. [2020-10-27 14:28:26,513 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 207 transitions. Word has length 184 [2020-10-27 14:28:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:26,513 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 207 transitions. [2020-10-27 14:28:26,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:28:26,513 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 207 transitions. [2020-10-27 14:28:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-27 14:28:26,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:26,516 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:26,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:28:26,516 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash 589062542, now seen corresponding path program 18 times [2020-10-27 14:28:26,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:26,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575817753] [2020-10-27 14:28:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:26,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:26,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:26,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:26,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:27,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:27,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:31,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:31,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-27 14:28:31,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:31,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:28:31,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:28:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 14:28:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:28:31,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:31,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:31,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:31,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:31,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:31,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:31,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:31,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:31,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2020-10-27 14:28:31,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575817753] [2020-10-27 14:28:31,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:31,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:28:31,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696039528] [2020-10-27 14:28:31,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:28:31,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:31,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:28:31,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:28:31,974 INFO L87 Difference]: Start difference. First operand 198 states and 207 transitions. Second operand 22 states. [2020-10-27 14:28:32,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:32,642 INFO L93 Difference]: Finished difference Result 380 states and 406 transitions. [2020-10-27 14:28:32,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:28:32,643 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 193 [2020-10-27 14:28:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:32,644 INFO L225 Difference]: With dead ends: 380 [2020-10-27 14:28:32,644 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 14:28:32,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:28:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 14:28:32,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-10-27 14:28:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 14:28:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 216 transitions. [2020-10-27 14:28:32,656 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 216 transitions. Word has length 193 [2020-10-27 14:28:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:32,657 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 216 transitions. [2020-10-27 14:28:32,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:28:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 216 transitions. [2020-10-27 14:28:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-27 14:28:32,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:32,658 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:32,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:28:32,659 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash -591511036, now seen corresponding path program 19 times [2020-10-27 14:28:32,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:32,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242462626] [2020-10-27 14:28:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:32,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:32,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:32,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:33,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:33,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:33,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:37,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:37,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-27 14:28:37,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:37,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:28:37,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:37,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:28:37,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-27 14:28:37,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:28:37,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:38,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:38,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:38,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:38,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:38,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:38,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:38,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:38,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-27 14:28:38,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242462626] [2020-10-27 14:28:38,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:38,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:28:38,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993614109] [2020-10-27 14:28:38,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:28:38,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:38,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:28:38,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:38,162 INFO L87 Difference]: Start difference. First operand 207 states and 216 transitions. Second operand 23 states. [2020-10-27 14:28:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:38,843 INFO L93 Difference]: Finished difference Result 397 states and 423 transitions. [2020-10-27 14:28:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:28:38,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 202 [2020-10-27 14:28:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:38,846 INFO L225 Difference]: With dead ends: 397 [2020-10-27 14:28:38,846 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 14:28:38,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 14:28:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-27 14:28:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-27 14:28:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 225 transitions. [2020-10-27 14:28:38,861 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 225 transitions. Word has length 202 [2020-10-27 14:28:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:38,862 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 225 transitions. [2020-10-27 14:28:38,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:28:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 225 transitions. [2020-10-27 14:28:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 14:28:38,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:38,865 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:38,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:28:38,865 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:38,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:38,866 INFO L82 PathProgramCache]: Analyzing trace with hash 781661774, now seen corresponding path program 20 times [2020-10-27 14:28:38,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:38,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830643466] [2020-10-27 14:28:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:39,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:39,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:39,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:39,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:39,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:43,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:43,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 14:28:43,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:43,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 14:28:43,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:43,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:28:43,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-27 14:28:43,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:28:43,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:44,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:44,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:44,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:44,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:44,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:44,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:44,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2020-10-27 14:28:44,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830643466] [2020-10-27 14:28:44,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:44,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:28:44,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646569859] [2020-10-27 14:28:44,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:28:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:28:44,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:44,435 INFO L87 Difference]: Start difference. First operand 216 states and 225 transitions. Second operand 24 states. [2020-10-27 14:28:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:45,115 INFO L93 Difference]: Finished difference Result 414 states and 440 transitions. [2020-10-27 14:28:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:28:45,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 211 [2020-10-27 14:28:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:45,118 INFO L225 Difference]: With dead ends: 414 [2020-10-27 14:28:45,118 INFO L226 Difference]: Without dead ends: 225 [2020-10-27 14:28:45,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:28:45,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-27 14:28:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2020-10-27 14:28:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-27 14:28:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 234 transitions. [2020-10-27 14:28:45,130 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 234 transitions. Word has length 211 [2020-10-27 14:28:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:45,130 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 234 transitions. [2020-10-27 14:28:45,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:28:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 234 transitions. [2020-10-27 14:28:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-27 14:28:45,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:45,132 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:45,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:28:45,133 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:45,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1734500284, now seen corresponding path program 21 times [2020-10-27 14:28:45,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:45,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836247452] [2020-10-27 14:28:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:45,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:45,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:45,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:46,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:50,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:50,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-27 14:28:50,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:50,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:28:50,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:50,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:28:50,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 14:28:50,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:28:50,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:50,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:50,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:50,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:50,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:50,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:50,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:50,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:50,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:50,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:50,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:50,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2020-10-27 14:28:50,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836247452] [2020-10-27 14:28:50,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:50,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:28:50,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685111499] [2020-10-27 14:28:50,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:28:50,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:50,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:28:50,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:50,727 INFO L87 Difference]: Start difference. First operand 225 states and 234 transitions. Second operand 25 states. [2020-10-27 14:28:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:51,371 INFO L93 Difference]: Finished difference Result 431 states and 457 transitions. [2020-10-27 14:28:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:28:51,372 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 220 [2020-10-27 14:28:51,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:51,374 INFO L225 Difference]: With dead ends: 431 [2020-10-27 14:28:51,374 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 14:28:51,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 14:28:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-10-27 14:28:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 14:28:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 243 transitions. [2020-10-27 14:28:51,385 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 243 transitions. Word has length 220 [2020-10-27 14:28:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:51,386 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 243 transitions. [2020-10-27 14:28:51,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:28:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 243 transitions. [2020-10-27 14:28:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-27 14:28:51,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:51,388 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:51,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:28:51,388 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2058446066, now seen corresponding path program 22 times [2020-10-27 14:28:51,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:51,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826737226] [2020-10-27 14:28:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:51,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:51,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:51,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:51,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:53,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:56,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:56,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-27 14:28:56,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:28:56,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:28:56,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:28:56,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-27 14:28:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:28:56,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:57,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:57,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:57,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:57,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:57,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:57,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:28:57,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:57,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:57,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:57,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:57,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2020-10-27 14:28:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826737226] [2020-10-27 14:28:57,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:57,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:28:57,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777638989] [2020-10-27 14:28:57,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:28:57,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:28:57,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:57,146 INFO L87 Difference]: Start difference. First operand 234 states and 243 transitions. Second operand 26 states. [2020-10-27 14:28:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:57,748 INFO L93 Difference]: Finished difference Result 448 states and 474 transitions. [2020-10-27 14:28:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:28:57,748 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 229 [2020-10-27 14:28:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:57,750 INFO L225 Difference]: With dead ends: 448 [2020-10-27 14:28:57,750 INFO L226 Difference]: Without dead ends: 243 [2020-10-27 14:28:57,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:28:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-27 14:28:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2020-10-27 14:28:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-27 14:28:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 252 transitions. [2020-10-27 14:28:57,761 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 252 transitions. Word has length 229 [2020-10-27 14:28:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:57,761 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 252 transitions. [2020-10-27 14:28:57,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:28:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 252 transitions. [2020-10-27 14:28:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-27 14:28:57,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:57,763 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:57,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:28:57,763 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:57,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:57,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1043992956, now seen corresponding path program 23 times [2020-10-27 14:28:57,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:57,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600498696] [2020-10-27 14:28:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:57,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:59,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:29:02,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:29:02,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:29:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-27 14:29:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:29:02,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:03,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:03,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:03,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:03,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:03,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:03,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:03,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:03,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:03,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:03,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2020-10-27 14:29:03,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600498696] [2020-10-27 14:29:03,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:03,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:29:03,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045916258] [2020-10-27 14:29:03,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:29:03,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:29:03,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:29:03,576 INFO L87 Difference]: Start difference. First operand 243 states and 252 transitions. Second operand 27 states. [2020-10-27 14:29:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:04,278 INFO L93 Difference]: Finished difference Result 465 states and 491 transitions. [2020-10-27 14:29:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:29:04,278 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 238 [2020-10-27 14:29:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:04,280 INFO L225 Difference]: With dead ends: 465 [2020-10-27 14:29:04,280 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 14:29:04,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:29:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 14:29:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-10-27 14:29:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-27 14:29:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 261 transitions. [2020-10-27 14:29:04,292 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 261 transitions. Word has length 238 [2020-10-27 14:29:04,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:04,292 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 261 transitions. [2020-10-27 14:29:04,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:29:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 261 transitions. [2020-10-27 14:29:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-27 14:29:04,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:04,294 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:04,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:29:04,296 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1032417330, now seen corresponding path program 24 times [2020-10-27 14:29:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:04,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433693253] [2020-10-27 14:29:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:04,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:04,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:04,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:04,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:06,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:09,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:09,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-27 14:29:09,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:29:09,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 14:29:09,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:09,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:29:09,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-27 14:29:09,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:29:09,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:09,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:09,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:09,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:09,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:09,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:09,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:09,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:09,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-27 14:29:10,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433693253] [2020-10-27 14:29:10,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:10,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:29:10,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747177866] [2020-10-27 14:29:10,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:29:10,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:10,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:29:10,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:29:10,016 INFO L87 Difference]: Start difference. First operand 252 states and 261 transitions. Second operand 28 states. [2020-10-27 14:29:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:10,772 INFO L93 Difference]: Finished difference Result 482 states and 508 transitions. [2020-10-27 14:29:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:29:10,773 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 247 [2020-10-27 14:29:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:10,774 INFO L225 Difference]: With dead ends: 482 [2020-10-27 14:29:10,774 INFO L226 Difference]: Without dead ends: 261 [2020-10-27 14:29:10,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:29:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-27 14:29:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-27 14:29:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 14:29:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 270 transitions. [2020-10-27 14:29:10,786 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 270 transitions. Word has length 247 [2020-10-27 14:29:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:10,787 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 270 transitions. [2020-10-27 14:29:10,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:29:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 270 transitions. [2020-10-27 14:29:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-27 14:29:10,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:10,789 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:10,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:29:10,789 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:10,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1107088188, now seen corresponding path program 25 times [2020-10-27 14:29:10,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:10,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294221938] [2020-10-27 14:29:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:10,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:13,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:15,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:15,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-27 14:29:15,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:29:15,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:29:15,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:15,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:29:15,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-10-27 14:29:15,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:29:15,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:16,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:16,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:16,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:16,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:16,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:16,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:16,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:16,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2925 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2600 trivial. 0 not checked. [2020-10-27 14:29:16,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294221938] [2020-10-27 14:29:16,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:16,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:29:16,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423955737] [2020-10-27 14:29:16,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:29:16,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:29:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:29:16,631 INFO L87 Difference]: Start difference. First operand 261 states and 270 transitions. Second operand 29 states. [2020-10-27 14:29:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:17,386 INFO L93 Difference]: Finished difference Result 499 states and 525 transitions. [2020-10-27 14:29:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:29:17,387 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 256 [2020-10-27 14:29:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:17,388 INFO L225 Difference]: With dead ends: 499 [2020-10-27 14:29:17,388 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 14:29:17,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:29:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 14:29:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2020-10-27 14:29:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-27 14:29:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 279 transitions. [2020-10-27 14:29:17,399 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 279 transitions. Word has length 256 [2020-10-27 14:29:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:17,400 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 279 transitions. [2020-10-27 14:29:17,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:29:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 279 transitions. [2020-10-27 14:29:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 14:29:17,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:17,402 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:17,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:29:17,402 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:17,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1773988722, now seen corresponding path program 26 times [2020-10-27 14:29:17,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:17,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536725833] [2020-10-27 14:29:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:17,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:18,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:18,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:19,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:22,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:22,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-27 14:29:22,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:29:22,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 14:29:22,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:29:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-27 14:29:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:29:22,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:23,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:23,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:23,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:23,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:23,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:23,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:23,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:23,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:23,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:23,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:23,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2020-10-27 14:29:23,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536725833] [2020-10-27 14:29:23,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:23,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:29:23,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523764572] [2020-10-27 14:29:23,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:29:23,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:29:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:29:23,244 INFO L87 Difference]: Start difference. First operand 270 states and 279 transitions. Second operand 30 states. [2020-10-27 14:29:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:24,066 INFO L93 Difference]: Finished difference Result 516 states and 542 transitions. [2020-10-27 14:29:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:29:24,066 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 265 [2020-10-27 14:29:24,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:24,068 INFO L225 Difference]: With dead ends: 516 [2020-10-27 14:29:24,068 INFO L226 Difference]: Without dead ends: 279 [2020-10-27 14:29:24,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:29:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-27 14:29:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2020-10-27 14:29:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-27 14:29:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 288 transitions. [2020-10-27 14:29:24,082 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 288 transitions. Word has length 265 [2020-10-27 14:29:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:24,082 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 288 transitions. [2020-10-27 14:29:24,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:29:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 288 transitions. [2020-10-27 14:29:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-27 14:29:24,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:24,084 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:24,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:29:24,085 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1579244292, now seen corresponding path program 27 times [2020-10-27 14:29:24,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:24,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786264660] [2020-10-27 14:29:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:24,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:24,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:24,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:24,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:26,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:29,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:29,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-27 14:29:29,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:29:29,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-27 14:29:29,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:29:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-10-27 14:29:29,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:29:29,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:29,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:29,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:29,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:29,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:29,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:29,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:29:29,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:29,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:29,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:29,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:29,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3402 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3024 trivial. 0 not checked. [2020-10-27 14:29:30,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786264660] [2020-10-27 14:29:30,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:30,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:29:30,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012648456] [2020-10-27 14:29:30,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:29:30,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:29:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:29:30,032 INFO L87 Difference]: Start difference. First operand 279 states and 288 transitions. Second operand 31 states. [2020-10-27 14:29:30,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:30,958 INFO L93 Difference]: Finished difference Result 533 states and 559 transitions. [2020-10-27 14:29:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:29:30,959 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 274 [2020-10-27 14:29:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:30,961 INFO L225 Difference]: With dead ends: 533 [2020-10-27 14:29:30,961 INFO L226 Difference]: Without dead ends: 288 [2020-10-27 14:29:30,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:29:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-27 14:29:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2020-10-27 14:29:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-27 14:29:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 297 transitions. [2020-10-27 14:29:30,973 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 297 transitions. Word has length 274 [2020-10-27 14:29:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:30,973 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 297 transitions. [2020-10-27 14:29:30,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:29:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 297 transitions. [2020-10-27 14:29:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-27 14:29:30,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:30,975 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:30,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:29:30,976 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:30,976 INFO L82 PathProgramCache]: Analyzing trace with hash 99101006, now seen corresponding path program 28 times [2020-10-27 14:29:30,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:30,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141386390] [2020-10-27 14:29:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:31,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:31,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:33,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:36,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-27 14:29:36,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:29:36,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 14:29:36,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:36,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:29:36,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-27 14:29:36,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:29:36,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:36,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:36,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:36,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:36,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:36,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:36,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:36,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:36,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3654 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3248 trivial. 0 not checked. [2020-10-27 14:29:36,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141386390] [2020-10-27 14:29:36,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:36,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:29:36,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318915868] [2020-10-27 14:29:36,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:29:36,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:29:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:29:36,913 INFO L87 Difference]: Start difference. First operand 288 states and 297 transitions. Second operand 32 states. [2020-10-27 14:29:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:37,879 INFO L93 Difference]: Finished difference Result 550 states and 576 transitions. [2020-10-27 14:29:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:29:37,885 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 283 [2020-10-27 14:29:37,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:37,887 INFO L225 Difference]: With dead ends: 550 [2020-10-27 14:29:37,887 INFO L226 Difference]: Without dead ends: 297 [2020-10-27 14:29:37,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:29:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-27 14:29:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2020-10-27 14:29:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-27 14:29:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 306 transitions. [2020-10-27 14:29:37,899 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 306 transitions. Word has length 283 [2020-10-27 14:29:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:37,900 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 306 transitions. [2020-10-27 14:29:37,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:29:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 306 transitions. [2020-10-27 14:29:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-10-27 14:29:37,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:37,902 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:37,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:29:37,902 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:37,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1645446844, now seen corresponding path program 29 times [2020-10-27 14:29:37,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:37,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162835205] [2020-10-27 14:29:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:38,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:38,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:38,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:38,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:40,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:43,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:43,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-27 14:29:43,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:29:43,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:29:43,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:29:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 166 [2020-10-27 14:29:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:29:43,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:43,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:43,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:43,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:43,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:43,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:43,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:43,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:43,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:43,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:43,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:43,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2020-10-27 14:29:43,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162835205] [2020-10-27 14:29:43,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:43,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:29:43,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047820384] [2020-10-27 14:29:43,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:29:43,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:43,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:29:43,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:29:43,839 INFO L87 Difference]: Start difference. First operand 297 states and 306 transitions. Second operand 33 states. [2020-10-27 14:29:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:44,686 INFO L93 Difference]: Finished difference Result 567 states and 593 transitions. [2020-10-27 14:29:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:29:44,686 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 292 [2020-10-27 14:29:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:44,689 INFO L225 Difference]: With dead ends: 567 [2020-10-27 14:29:44,689 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 14:29:44,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:29:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 14:29:44,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2020-10-27 14:29:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-27 14:29:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 315 transitions. [2020-10-27 14:29:44,701 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 315 transitions. Word has length 292 [2020-10-27 14:29:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:44,701 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 315 transitions. [2020-10-27 14:29:44,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:29:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 315 transitions. [2020-10-27 14:29:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-27 14:29:44,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:44,703 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:44,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:29:44,704 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1415983602, now seen corresponding path program 30 times [2020-10-27 14:29:44,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:44,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297791481] [2020-10-27 14:29:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:45,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:45,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:45,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:45,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:47,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:49,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:49,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-27 14:29:49,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:29:49,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:29:49,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:49,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:29:49,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-10-27 14:29:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:29:49,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:50,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:50,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:50,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:50,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:50,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:50,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:50,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:50,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4185 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3720 trivial. 0 not checked. [2020-10-27 14:29:50,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297791481] [2020-10-27 14:29:50,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:50,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:29:50,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043519542] [2020-10-27 14:29:50,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:29:50,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:29:50,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:29:50,602 INFO L87 Difference]: Start difference. First operand 306 states and 315 transitions. Second operand 34 states. [2020-10-27 14:29:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:51,452 INFO L93 Difference]: Finished difference Result 584 states and 610 transitions. [2020-10-27 14:29:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:29:51,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 301 [2020-10-27 14:29:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:51,459 INFO L225 Difference]: With dead ends: 584 [2020-10-27 14:29:51,459 INFO L226 Difference]: Without dead ends: 315 [2020-10-27 14:29:51,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:29:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-27 14:29:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2020-10-27 14:29:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-27 14:29:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 324 transitions. [2020-10-27 14:29:51,471 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 324 transitions. Word has length 301 [2020-10-27 14:29:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:51,471 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 324 transitions. [2020-10-27 14:29:51,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:29:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 324 transitions. [2020-10-27 14:29:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-27 14:29:51,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:51,474 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:51,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:29:51,474 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1680902020, now seen corresponding path program 31 times [2020-10-27 14:29:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:51,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445739408] [2020-10-27 14:29:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:51,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:51,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:54,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:56,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:56,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-27 14:29:56,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:29:56,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 14:29:56,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:29:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-10-27 14:29:56,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:29:56,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:57,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:57,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:57,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:57,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:57,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:29:57,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:57,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:57,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:57,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:57,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4464 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3968 trivial. 0 not checked. [2020-10-27 14:29:57,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445739408] [2020-10-27 14:29:57,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:57,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:29:57,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176973070] [2020-10-27 14:29:57,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:29:57,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:57,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:29:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:29:57,567 INFO L87 Difference]: Start difference. First operand 315 states and 324 transitions. Second operand 35 states. [2020-10-27 14:29:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:58,423 INFO L93 Difference]: Finished difference Result 601 states and 627 transitions. [2020-10-27 14:29:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:29:58,423 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 310 [2020-10-27 14:29:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:58,426 INFO L225 Difference]: With dead ends: 601 [2020-10-27 14:29:58,427 INFO L226 Difference]: Without dead ends: 324 [2020-10-27 14:29:58,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:29:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-27 14:29:58,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2020-10-27 14:29:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-27 14:29:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 333 transitions. [2020-10-27 14:29:58,438 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 333 transitions. Word has length 310 [2020-10-27 14:29:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:58,438 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 333 transitions. [2020-10-27 14:29:58,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:29:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 333 transitions. [2020-10-27 14:29:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-27 14:29:58,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:58,441 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:58,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:29:58,441 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash -158596402, now seen corresponding path program 32 times [2020-10-27 14:29:58,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:58,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638017726] [2020-10-27 14:29:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:58,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:02,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:03,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:03,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-27 14:30:03,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:30:03,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-27 14:30:03,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:03,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:30:03,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-27 14:30:03,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:30:03,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:04,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:04,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:04,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:04,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:04,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:04,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:04,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:04,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 4224 trivial. 0 not checked. [2020-10-27 14:30:04,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638017726] [2020-10-27 14:30:04,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:04,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:30:04,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105053945] [2020-10-27 14:30:04,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:30:04,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:04,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:30:04,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:30:04,601 INFO L87 Difference]: Start difference. First operand 324 states and 333 transitions. Second operand 36 states. [2020-10-27 14:30:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:05,699 INFO L93 Difference]: Finished difference Result 618 states and 644 transitions. [2020-10-27 14:30:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:30:05,699 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 319 [2020-10-27 14:30:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:05,702 INFO L225 Difference]: With dead ends: 618 [2020-10-27 14:30:05,702 INFO L226 Difference]: Without dead ends: 333 [2020-10-27 14:30:05,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:30:05,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-27 14:30:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2020-10-27 14:30:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-27 14:30:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 342 transitions. [2020-10-27 14:30:05,715 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 342 transitions. Word has length 319 [2020-10-27 14:30:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:05,715 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 342 transitions. [2020-10-27 14:30:05,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:30:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 342 transitions. [2020-10-27 14:30:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-27 14:30:05,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:05,725 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:05,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:30:05,725 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:05,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1119454660, now seen corresponding path program 33 times [2020-10-27 14:30:05,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:05,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495490878] [2020-10-27 14:30:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:05,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:06,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:06,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:06,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:06,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:10,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-27 14:30:10,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:30:10,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-27 14:30:10,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:10,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:30:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 186 [2020-10-27 14:30:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:30:10,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:11,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:11,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:11,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:11,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:11,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:11,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:11,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:11,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:11,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:11,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:11,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5049 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2020-10-27 14:30:11,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495490878] [2020-10-27 14:30:11,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:11,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:30:11,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789646759] [2020-10-27 14:30:11,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:30:11,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:30:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:30:11,898 INFO L87 Difference]: Start difference. First operand 333 states and 342 transitions. Second operand 37 states. [2020-10-27 14:30:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:12,938 INFO L93 Difference]: Finished difference Result 635 states and 661 transitions. [2020-10-27 14:30:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:30:12,939 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 328 [2020-10-27 14:30:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:12,942 INFO L225 Difference]: With dead ends: 635 [2020-10-27 14:30:12,942 INFO L226 Difference]: Without dead ends: 342 [2020-10-27 14:30:12,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:30:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-27 14:30:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2020-10-27 14:30:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-27 14:30:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 351 transitions. [2020-10-27 14:30:12,955 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 351 transitions. Word has length 328 [2020-10-27 14:30:12,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:12,956 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 351 transitions. [2020-10-27 14:30:12,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:30:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 351 transitions. [2020-10-27 14:30:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-27 14:30:12,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:12,958 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:12,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:30:12,959 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1794295694, now seen corresponding path program 34 times [2020-10-27 14:30:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:12,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200686217] [2020-10-27 14:30:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:13,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:13,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:14,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:17,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:18,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:18,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-27 14:30:18,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:30:18,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 14:30:18,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:30:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-27 14:30:18,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:30:18,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:19,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:19,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:19,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:19,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:19,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:19,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:19,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2020-10-27 14:30:19,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200686217] [2020-10-27 14:30:19,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:19,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:30:19,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261890674] [2020-10-27 14:30:19,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:30:19,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:19,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:30:19,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:30:19,264 INFO L87 Difference]: Start difference. First operand 342 states and 351 transitions. Second operand 38 states. [2020-10-27 14:30:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:20,436 INFO L93 Difference]: Finished difference Result 652 states and 678 transitions. [2020-10-27 14:30:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:30:20,437 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 337 [2020-10-27 14:30:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:20,440 INFO L225 Difference]: With dead ends: 652 [2020-10-27 14:30:20,440 INFO L226 Difference]: Without dead ends: 351 [2020-10-27 14:30:20,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:30:20,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-27 14:30:20,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2020-10-27 14:30:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-27 14:30:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 360 transitions. [2020-10-27 14:30:20,453 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 360 transitions. Word has length 337 [2020-10-27 14:30:20,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:20,454 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 360 transitions. [2020-10-27 14:30:20,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:30:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 360 transitions. [2020-10-27 14:30:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-10-27 14:30:20,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:20,456 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:20,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:30:20,457 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 911438852, now seen corresponding path program 35 times [2020-10-27 14:30:20,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:20,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948061704] [2020-10-27 14:30:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:20,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:21,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:21,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:21,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:25,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:25,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:25,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-27 14:30:25,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:30:25,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 14:30:25,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:25,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:30:25,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-10-27 14:30:25,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:30:25,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:26,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:26,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:26,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:26,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:26,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:26,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:26,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:26,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:26,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:26,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:26,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5670 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2020-10-27 14:30:26,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948061704] [2020-10-27 14:30:26,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:26,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:30:26,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517924230] [2020-10-27 14:30:26,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:30:26,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:30:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:30:26,701 INFO L87 Difference]: Start difference. First operand 351 states and 360 transitions. Second operand 39 states. [2020-10-27 14:30:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:27,895 INFO L93 Difference]: Finished difference Result 669 states and 695 transitions. [2020-10-27 14:30:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:30:27,895 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 346 [2020-10-27 14:30:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:27,899 INFO L225 Difference]: With dead ends: 669 [2020-10-27 14:30:27,899 INFO L226 Difference]: Without dead ends: 360 [2020-10-27 14:30:27,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:30:27,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-27 14:30:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2020-10-27 14:30:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-27 14:30:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 369 transitions. [2020-10-27 14:30:27,913 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 369 transitions. Word has length 346 [2020-10-27 14:30:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:27,913 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 369 transitions. [2020-10-27 14:30:27,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:30:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 369 transitions. [2020-10-27 14:30:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-10-27 14:30:27,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:27,916 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:27,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:30:27,916 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:27,917 INFO L82 PathProgramCache]: Analyzing trace with hash -503178162, now seen corresponding path program 36 times [2020-10-27 14:30:27,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:27,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302162810] [2020-10-27 14:30:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:28,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:33,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:33,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 365 [2020-10-27 14:30:33,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:30:33,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-27 14:30:33,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:33,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:30:33,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-27 14:30:33,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:30:33,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:34,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:34,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:34,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:34,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:34,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:34,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:34,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:34,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:34,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:34,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:34,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 5328 trivial. 0 not checked. [2020-10-27 14:30:34,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302162810] [2020-10-27 14:30:34,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:34,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:30:34,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253154470] [2020-10-27 14:30:34,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:30:34,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:34,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:30:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:30:34,357 INFO L87 Difference]: Start difference. First operand 360 states and 369 transitions. Second operand 40 states. [2020-10-27 14:30:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:35,645 INFO L93 Difference]: Finished difference Result 686 states and 712 transitions. [2020-10-27 14:30:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:30:35,646 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 355 [2020-10-27 14:30:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:35,648 INFO L225 Difference]: With dead ends: 686 [2020-10-27 14:30:35,649 INFO L226 Difference]: Without dead ends: 369 [2020-10-27 14:30:35,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:30:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-27 14:30:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2020-10-27 14:30:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-27 14:30:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 378 transitions. [2020-10-27 14:30:35,662 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 378 transitions. Word has length 355 [2020-10-27 14:30:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:35,662 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 378 transitions. [2020-10-27 14:30:35,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:30:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 378 transitions. [2020-10-27 14:30:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-10-27 14:30:35,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:35,665 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:35,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:30:35,665 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:35,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1724535364, now seen corresponding path program 37 times [2020-10-27 14:30:35,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:35,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480754464] [2020-10-27 14:30:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:35,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking...