/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:38:12,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:38:12,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:38:12,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:38:12,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:38:12,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:38:12,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:38:12,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:38:12,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:38:12,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:38:12,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:38:12,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:38:12,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:38:12,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:38:12,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:38:12,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:38:12,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:38:12,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:38:12,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:38:12,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:38:12,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:38:12,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:38:12,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:38:12,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:38:12,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:38:12,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:38:12,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:38:12,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:38:12,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:38:12,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:38:12,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:38:12,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:38:12,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:38:12,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:38:12,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:38:12,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:38:12,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:38:12,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:38:12,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:38:12,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:38:12,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:38:12,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 22:38:12,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:38:12,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:38:12,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:38:12,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:38:12,603 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:38:12,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:38:12,604 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:38:12,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:38:12,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:38:12,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:38:12,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:38:12,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:38:12,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:38:12,605 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:38:12,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:38:12,605 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:38:12,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:38:12,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:38:12,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:38:12,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:38:12,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:38:12,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:38:12,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:38:12,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:38:12,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:38:12,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:38:12,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:38:12,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:38:12,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:38:12,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:38:13,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:38:13,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:38:13,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:38:13,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:38:13,119 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:38:13,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label22.c [2020-10-26 22:38:13,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ddb5c7a96/60ea3198daf142abaebe98839151c130/FLAG82e05c2db [2020-10-26 22:38:13,995 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:38:13,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label22.c [2020-10-26 22:38:14,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ddb5c7a96/60ea3198daf142abaebe98839151c130/FLAG82e05c2db [2020-10-26 22:38:14,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ddb5c7a96/60ea3198daf142abaebe98839151c130 [2020-10-26 22:38:14,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:38:14,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:38:14,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:38:14,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:38:14,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:38:14,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:38:14" (1/1) ... [2020-10-26 22:38:14,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@767379e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:14, skipping insertion in model container [2020-10-26 22:38:14,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:38:14" (1/1) ... [2020-10-26 22:38:14,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:38:14,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:38:14,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:38:14,890 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:38:15,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:38:15,081 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:38:15,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15 WrapperNode [2020-10-26 22:38:15,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:38:15,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:38:15,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:38:15,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:38:15,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15" (1/1) ... [2020-10-26 22:38:15,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15" (1/1) ... [2020-10-26 22:38:15,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15" (1/1) ... [2020-10-26 22:38:15,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15" (1/1) ... [2020-10-26 22:38:15,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15" (1/1) ... [2020-10-26 22:38:15,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15" (1/1) ... [2020-10-26 22:38:15,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15" (1/1) ... [2020-10-26 22:38:15,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:38:15,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:38:15,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:38:15,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:38:15,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:38:15,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:38:15,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:38:15,386 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:38:15,386 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:38:15,386 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:38:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:38:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:38:15,386 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:38:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:38:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:38:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:38:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:38:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:38:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:38:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:38:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:38:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:38:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:38:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:38:17,255 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:38:17,255 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:38:17,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:38:17 BoogieIcfgContainer [2020-10-26 22:38:17,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:38:17,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:38:17,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:38:17,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:38:17,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:38:14" (1/3) ... [2020-10-26 22:38:17,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715f85fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:38:17, skipping insertion in model container [2020-10-26 22:38:17,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:38:15" (2/3) ... [2020-10-26 22:38:17,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715f85fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:38:17, skipping insertion in model container [2020-10-26 22:38:17,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:38:17" (3/3) ... [2020-10-26 22:38:17,268 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label22.c [2020-10-26 22:38:17,281 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:38:17,287 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:38:17,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:38:17,333 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:38:17,333 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:38:17,333 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:38:17,333 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:38:17,333 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:38:17,334 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:38:17,334 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:38:17,334 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:38:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-26 22:38:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 22:38:17,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:17,371 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:17,371 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash -402515048, now seen corresponding path program 1 times [2020-10-26 22:38:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:17,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815963120] [2020-10-26 22:38:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:17,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:18,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:18,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 22:38:18,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:18,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-26 22:38:18,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:38:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:18,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-26 22:38:18,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:38:18,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:18,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:18,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:18,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:18,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 22:38:18,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:18,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:18,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:18,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:18,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:38:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:38:18,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815963120] [2020-10-26 22:38:18,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:38:18,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:38:18,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951701253] [2020-10-26 22:38:18,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:38:18,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:18,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:38:18,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:38:18,698 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 4 states. [2020-10-26 22:38:18,997 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 22:38:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:22,080 INFO L93 Difference]: Finished difference Result 793 states and 1388 transitions. [2020-10-26 22:38:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:38:22,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-26 22:38:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:22,102 INFO L225 Difference]: With dead ends: 793 [2020-10-26 22:38:22,103 INFO L226 Difference]: Without dead ends: 432 [2020-10-26 22:38:22,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:38:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-26 22:38:22,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 426. [2020-10-26 22:38:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-26 22:38:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 613 transitions. [2020-10-26 22:38:22,233 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 613 transitions. Word has length 62 [2020-10-26 22:38:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:22,234 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 613 transitions. [2020-10-26 22:38:22,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:38:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 613 transitions. [2020-10-26 22:38:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-26 22:38:22,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:22,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:38:22,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:38:22,243 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:22,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:22,243 INFO L82 PathProgramCache]: Analyzing trace with hash -39349676, now seen corresponding path program 1 times [2020-10-26 22:38:22,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:22,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281407923] [2020-10-26 22:38:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:22,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:23,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:24,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:24,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:38:24,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2445 [2020-10-26 22:38:24,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:24,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:38:24,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:24,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:38:24,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:38:24,919 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:38:24,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:24,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:24,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:24,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:24,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:24,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 22:38:24,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:24,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:24,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:24,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:24,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:24,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:25,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:25,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:25,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:38:25,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:25,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-26 22:38:25,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:25,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:38:25,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:38:25,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281407923] [2020-10-26 22:38:25,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:38:25,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:38:25,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724879891] [2020-10-26 22:38:25,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:25,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:25,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:25,370 INFO L87 Difference]: Start difference. First operand 426 states and 613 transitions. Second operand 7 states. [2020-10-26 22:38:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:28,856 INFO L93 Difference]: Finished difference Result 1266 states and 1840 transitions. [2020-10-26 22:38:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:38:28,857 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 134 [2020-10-26 22:38:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:28,865 INFO L225 Difference]: With dead ends: 1266 [2020-10-26 22:38:28,865 INFO L226 Difference]: Without dead ends: 846 [2020-10-26 22:38:28,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:38:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-10-26 22:38:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 822. [2020-10-26 22:38:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 822 states. [2020-10-26 22:38:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1103 transitions. [2020-10-26 22:38:28,946 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1103 transitions. Word has length 134 [2020-10-26 22:38:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:28,947 INFO L481 AbstractCegarLoop]: Abstraction has 822 states and 1103 transitions. [2020-10-26 22:38:28,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1103 transitions. [2020-10-26 22:38:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-26 22:38:28,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:28,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2020-10-26 22:38:28,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:38:28,963 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash 373397572, now seen corresponding path program 1 times [2020-10-26 22:38:28,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:28,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461593345] [2020-10-26 22:38:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:29,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:29,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:29,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:30,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:30,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-26 22:38:30,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:30,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1811 [2020-10-26 22:38:30,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:30,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:38:30,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:30,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:38:30,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:30,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:30,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:31,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:31,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:31,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:38:31,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:31,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:31,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:31,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:31,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:31,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:31,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:31,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:38:31,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:31,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-26 22:38:31,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:31,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:31,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:31,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:38:31,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:38:31,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461593345] [2020-10-26 22:38:31,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:38:31,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:38:31,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803137421] [2020-10-26 22:38:31,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:31,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:31,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:31,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:31,371 INFO L87 Difference]: Start difference. First operand 822 states and 1103 transitions. Second operand 7 states. [2020-10-26 22:38:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:34,506 INFO L93 Difference]: Finished difference Result 2073 states and 2745 transitions. [2020-10-26 22:38:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:38:34,507 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-10-26 22:38:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:34,515 INFO L225 Difference]: With dead ends: 2073 [2020-10-26 22:38:34,516 INFO L226 Difference]: Without dead ends: 1257 [2020-10-26 22:38:34,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:38:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2020-10-26 22:38:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1220. [2020-10-26 22:38:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1220 states. [2020-10-26 22:38:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1544 transitions. [2020-10-26 22:38:34,571 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1544 transitions. Word has length 142 [2020-10-26 22:38:34,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:34,572 INFO L481 AbstractCegarLoop]: Abstraction has 1220 states and 1544 transitions. [2020-10-26 22:38:34,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1544 transitions. [2020-10-26 22:38:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 22:38:34,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:34,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:34,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:38:34,578 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash 804484043, now seen corresponding path program 1 times [2020-10-26 22:38:34,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:34,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271667853] [2020-10-26 22:38:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:35,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-26 22:38:35,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:35,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-26 22:38:35,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:38:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 22:38:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:35,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:35,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:35,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:35,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:35,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:38:35,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:35,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:35,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:35,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:35,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:35,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:35,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:35,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:38:35,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:35,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 22:38:35,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:35,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:35,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:38:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:38:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:38:35,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271667853] [2020-10-26 22:38:35,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:35,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:38:35,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009310952] [2020-10-26 22:38:35,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:38:35,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:35,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:38:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:38:35,499 INFO L87 Difference]: Start difference. First operand 1220 states and 1544 transitions. Second operand 5 states. [2020-10-26 22:38:38,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:38,304 INFO L93 Difference]: Finished difference Result 2089 states and 2853 transitions. [2020-10-26 22:38:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:38:38,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 193 [2020-10-26 22:38:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:38,320 INFO L225 Difference]: With dead ends: 2089 [2020-10-26 22:38:38,325 INFO L226 Difference]: Without dead ends: 1649 [2020-10-26 22:38:38,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:38:38,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-10-26 22:38:38,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1632. [2020-10-26 22:38:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1632 states. [2020-10-26 22:38:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2104 transitions. [2020-10-26 22:38:38,394 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2104 transitions. Word has length 193 [2020-10-26 22:38:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:38,396 INFO L481 AbstractCegarLoop]: Abstraction has 1632 states and 2104 transitions. [2020-10-26 22:38:38,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:38:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2104 transitions. [2020-10-26 22:38:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 22:38:38,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:38,405 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:38,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:38:38,405 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:38,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1120434134, now seen corresponding path program 1 times [2020-10-26 22:38:38,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:38,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234393386] [2020-10-26 22:38:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:38,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:38,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:40,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 22:38:41,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:41,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2541 [2020-10-26 22:38:41,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:41,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:38:41,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:38:41,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:41,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:38:41,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:41,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:41,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:41,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:41,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 22:38:41,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:41,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:41,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:38:41,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:41,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:41,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:41,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:38:41,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:41,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 22:38:41,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:41,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:38:41,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 177 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:38:41,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234393386] [2020-10-26 22:38:41,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:41,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:41,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809962150] [2020-10-26 22:38:41,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:41,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:41,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:41,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:41,706 INFO L87 Difference]: Start difference. First operand 1632 states and 2104 transitions. Second operand 7 states. [2020-10-26 22:38:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:45,009 INFO L93 Difference]: Finished difference Result 3502 states and 4764 transitions. [2020-10-26 22:38:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:38:45,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2020-10-26 22:38:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:45,029 INFO L225 Difference]: With dead ends: 3502 [2020-10-26 22:38:45,030 INFO L226 Difference]: Without dead ends: 2254 [2020-10-26 22:38:45,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:38:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2020-10-26 22:38:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2231. [2020-10-26 22:38:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2231 states. [2020-10-26 22:38:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 3002 transitions. [2020-10-26 22:38:45,123 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 3002 transitions. Word has length 250 [2020-10-26 22:38:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:45,124 INFO L481 AbstractCegarLoop]: Abstraction has 2231 states and 3002 transitions. [2020-10-26 22:38:45,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 3002 transitions. [2020-10-26 22:38:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-26 22:38:45,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:45,130 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:45,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:38:45,130 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1257565854, now seen corresponding path program 1 times [2020-10-26 22:38:45,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:45,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977128847] [2020-10-26 22:38:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:45,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:45,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:46,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:48,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:48,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-26 22:38:48,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:48,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2945 [2020-10-26 22:38:48,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 22:38:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-26 22:38:48,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:48,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:48,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:48,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:48,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:48,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:48,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 22:38:48,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:48,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:48,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:48,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:48,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:38:48,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:48,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:48,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:48,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:48,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:48,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-26 22:38:48,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:48,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:48,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:38:48,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:48,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:49,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:49,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:38:49,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:49,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-26 22:38:49,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:49,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:38:49,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:38:49,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 94 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 22:38:49,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977128847] [2020-10-26 22:38:49,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:49,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:49,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767324151] [2020-10-26 22:38:49,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:38:49,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:49,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:38:49,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:38:49,386 INFO L87 Difference]: Start difference. First operand 2231 states and 3002 transitions. Second operand 8 states. [2020-10-26 22:38:50,852 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:38:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:52,913 INFO L93 Difference]: Finished difference Result 3546 states and 4946 transitions. [2020-10-26 22:38:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:38:52,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 251 [2020-10-26 22:38:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:52,927 INFO L225 Difference]: With dead ends: 3546 [2020-10-26 22:38:52,928 INFO L226 Difference]: Without dead ends: 2279 [2020-10-26 22:38:52,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:38:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2020-10-26 22:38:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2238. [2020-10-26 22:38:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2238 states. [2020-10-26 22:38:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 3009 transitions. [2020-10-26 22:38:53,011 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 3009 transitions. Word has length 251 [2020-10-26 22:38:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:53,012 INFO L481 AbstractCegarLoop]: Abstraction has 2238 states and 3009 transitions. [2020-10-26 22:38:53,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:38:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 3009 transitions. [2020-10-26 22:38:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-26 22:38:53,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:53,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:53,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:38:53,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:53,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1930197978, now seen corresponding path program 1 times [2020-10-26 22:38:53,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:53,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482377910] [2020-10-26 22:38:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:53,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:55,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:55,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-26 22:38:55,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:55,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2728 [2020-10-26 22:38:55,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:55,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:55,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:38:55,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:38:55,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:55,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:55,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:55,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:55,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:55,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:55,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:38:55,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:55,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:55,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:55,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:55,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:55,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:56,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:56,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:56,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:56,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:56,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-26 22:38:56,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:56,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:56,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:56,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:38:56,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:56,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:56,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:56,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:56,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:38:56,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:56,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-26 22:38:56,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:56,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:56,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:56,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:38:56,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:38:56,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482377910] [2020-10-26 22:38:56,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:56,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:56,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353392081] [2020-10-26 22:38:56,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:56,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:56,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:56,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:56,666 INFO L87 Difference]: Start difference. First operand 2238 states and 3009 transitions. Second operand 7 states. [2020-10-26 22:39:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:00,177 INFO L93 Difference]: Finished difference Result 5350 states and 7526 transitions. [2020-10-26 22:39:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:39:00,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 252 [2020-10-26 22:39:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:00,200 INFO L225 Difference]: With dead ends: 5350 [2020-10-26 22:39:00,200 INFO L226 Difference]: Without dead ends: 3496 [2020-10-26 22:39:00,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:39:00,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2020-10-26 22:39:00,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3428. [2020-10-26 22:39:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3428 states. [2020-10-26 22:39:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 4465 transitions. [2020-10-26 22:39:00,318 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 4465 transitions. Word has length 252 [2020-10-26 22:39:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:00,319 INFO L481 AbstractCegarLoop]: Abstraction has 3428 states and 4465 transitions. [2020-10-26 22:39:00,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 4465 transitions. [2020-10-26 22:39:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 22:39:00,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:00,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:00,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:39:00,326 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:00,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:00,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1178687514, now seen corresponding path program 1 times [2020-10-26 22:39:00,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:00,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049811231] [2020-10-26 22:39:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:00,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:00,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:00,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:02,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:03,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:03,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 22:39:03,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:39:03,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3027 [2020-10-26 22:39:03,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:03,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:39:03,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:39:03,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:39:03,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:03,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:03,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:03,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:03,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:03,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:03,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:39:03,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:03,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:03,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:03,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:03,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:03,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:03,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:03,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:03,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:39:03,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:03,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-26 22:39:03,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:39:03,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:39:03,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:39:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:03,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:04,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:04,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:39:04,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:04,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-26 22:39:04,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:04,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:04,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:39:04,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 129 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:39:04,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049811231] [2020-10-26 22:39:04,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:04,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:39:04,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018345533] [2020-10-26 22:39:04,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:39:04,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:04,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:39:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:39:04,255 INFO L87 Difference]: Start difference. First operand 3428 states and 4465 transitions. Second operand 6 states. [2020-10-26 22:39:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:07,597 INFO L93 Difference]: Finished difference Result 8873 states and 12005 transitions. [2020-10-26 22:39:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:39:07,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 258 [2020-10-26 22:39:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:07,632 INFO L225 Difference]: With dead ends: 8873 [2020-10-26 22:39:07,633 INFO L226 Difference]: Without dead ends: 5829 [2020-10-26 22:39:07,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:39:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5829 states. [2020-10-26 22:39:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5829 to 5609. [2020-10-26 22:39:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5609 states. [2020-10-26 22:39:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 7355 transitions. [2020-10-26 22:39:07,805 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 7355 transitions. Word has length 258 [2020-10-26 22:39:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:07,806 INFO L481 AbstractCegarLoop]: Abstraction has 5609 states and 7355 transitions. [2020-10-26 22:39:07,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:39:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 7355 transitions. [2020-10-26 22:39:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-26 22:39:07,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:07,815 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:07,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:39:07,815 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:07,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1444108375, now seen corresponding path program 1 times [2020-10-26 22:39:07,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:07,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594446600] [2020-10-26 22:39:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:07,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:08,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:09,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:09,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:09,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-26 22:39:09,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:39:09,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1994 [2020-10-26 22:39:09,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:39:09,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 22:39:09,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:10,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:10,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:10,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:10,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:10,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:10,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:39:10,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:10,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:10,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:10,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:10,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:10,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:39:10,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:10,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 22:39:10,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:10,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:10,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:10,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:39:10,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:10,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:39:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:10,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:10,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:10,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 22:39:10,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:10,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-26 22:39:10,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:10,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:10,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:10,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-26 22:39:10,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:39:10,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594446600] [2020-10-26 22:39:10,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:10,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:10,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909167135] [2020-10-26 22:39:10,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:10,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:10,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:10,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:10,618 INFO L87 Difference]: Start difference. First operand 5609 states and 7355 transitions. Second operand 7 states. [2020-10-26 22:39:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:14,183 INFO L93 Difference]: Finished difference Result 11655 states and 15765 transitions. [2020-10-26 22:39:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:39:14,186 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 289 [2020-10-26 22:39:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:14,223 INFO L225 Difference]: With dead ends: 11655 [2020-10-26 22:39:14,224 INFO L226 Difference]: Without dead ends: 6430 [2020-10-26 22:39:14,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:39:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6430 states. [2020-10-26 22:39:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6430 to 6403. [2020-10-26 22:39:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6403 states. [2020-10-26 22:39:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6403 states to 6403 states and 8451 transitions. [2020-10-26 22:39:14,423 INFO L78 Accepts]: Start accepts. Automaton has 6403 states and 8451 transitions. Word has length 289 [2020-10-26 22:39:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:14,424 INFO L481 AbstractCegarLoop]: Abstraction has 6403 states and 8451 transitions. [2020-10-26 22:39:14,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6403 states and 8451 transitions. [2020-10-26 22:39:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-10-26 22:39:14,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:14,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:14,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:39:14,434 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:14,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1146109587, now seen corresponding path program 1 times [2020-10-26 22:39:14,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:14,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325362468] [2020-10-26 22:39:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:14,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:14,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:16,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:16,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-26 22:39:16,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:16,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-10-26 22:39:16,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:16,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:16,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:39:16,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 22:39:16,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:16,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:16,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:16,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:16,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:16,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:16,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:39:16,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:16,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:16,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:16,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:16,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:16,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:16,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:16,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:39:16,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:16,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 22:39:16,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:16,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:16,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:16,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:39:16,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:39:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:16,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:16,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:16,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 22:39:16,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:16,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-26 22:39:16,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 22:39:16,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 204 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:39:16,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325362468] [2020-10-26 22:39:16,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:16,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:16,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971576643] [2020-10-26 22:39:16,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:16,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:16,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:16,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:16,865 INFO L87 Difference]: Start difference. First operand 6403 states and 8451 transitions. Second operand 7 states. [2020-10-26 22:39:20,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:20,369 INFO L93 Difference]: Finished difference Result 15716 states and 21475 transitions. [2020-10-26 22:39:20,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:39:20,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 292 [2020-10-26 22:39:20,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:20,435 INFO L225 Difference]: With dead ends: 15716 [2020-10-26 22:39:20,435 INFO L226 Difference]: Without dead ends: 9697 [2020-10-26 22:39:20,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:39:20,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9697 states. [2020-10-26 22:39:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9697 to 9297. [2020-10-26 22:39:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9297 states. [2020-10-26 22:39:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 12532 transitions. [2020-10-26 22:39:20,759 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 12532 transitions. Word has length 292 [2020-10-26 22:39:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:20,760 INFO L481 AbstractCegarLoop]: Abstraction has 9297 states and 12532 transitions. [2020-10-26 22:39:20,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 12532 transitions. [2020-10-26 22:39:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-10-26 22:39:20,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:20,771 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2020-10-26 22:39:20,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:39:20,772 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash 157956211, now seen corresponding path program 1 times [2020-10-26 22:39:20,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:20,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479302888] [2020-10-26 22:39:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:22,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:22,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-26 22:39:22,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:22,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1468 [2020-10-26 22:39:22,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:39:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-26 22:39:22,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:22,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:22,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:22,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:22,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:22,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:22,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:39:22,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:22,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:22,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:22,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:22,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:22,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:22,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:22,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:22,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:39:22,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:22,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 22:39:22,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:22,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:22,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:22,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:39:22,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:22,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:39:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:22,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:22,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:22,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:39:22,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:22,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-26 22:39:22,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:22,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:22,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:39:22,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 216 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:39:23,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479302888] [2020-10-26 22:39:23,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:23,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:23,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069669417] [2020-10-26 22:39:23,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:23,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:23,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:23,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:23,057 INFO L87 Difference]: Start difference. First operand 9297 states and 12532 transitions. Second operand 7 states. [2020-10-26 22:39:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:27,170 INFO L93 Difference]: Finished difference Result 19087 states and 26982 transitions. [2020-10-26 22:39:27,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:39:27,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 306 [2020-10-26 22:39:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:27,237 INFO L225 Difference]: With dead ends: 19087 [2020-10-26 22:39:27,237 INFO L226 Difference]: Without dead ends: 10174 [2020-10-26 22:39:27,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:39:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10174 states. [2020-10-26 22:39:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10174 to 10054. [2020-10-26 22:39:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10054 states. [2020-10-26 22:39:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10054 states to 10054 states and 13364 transitions. [2020-10-26 22:39:27,573 INFO L78 Accepts]: Start accepts. Automaton has 10054 states and 13364 transitions. Word has length 306 [2020-10-26 22:39:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:27,574 INFO L481 AbstractCegarLoop]: Abstraction has 10054 states and 13364 transitions. [2020-10-26 22:39:27,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 10054 states and 13364 transitions. [2020-10-26 22:39:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-26 22:39:27,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:27,581 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:39:27,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 22:39:27,582 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:27,582 INFO L82 PathProgramCache]: Analyzing trace with hash 261255560, now seen corresponding path program 1 times [2020-10-26 22:39:27,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:27,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605365029] [2020-10-26 22:39:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:27,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:27,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:28,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:28,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-26 22:39:28,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:28,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-26 22:39:28,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:28,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:28,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 258 [2020-10-26 22:39:28,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 22:39:28,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:28,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:28,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:28,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:28,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:28,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:28,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:39:28,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:28,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:28,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:28,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:28,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:28,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:28,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:29,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:29,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:39:29,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:29,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 22:39:29,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:29,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:29,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:29,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:29,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:29,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:39:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:29,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:29,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:29,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 22:39:29,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-26 22:39:29,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:29,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:39:29,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-26 22:39:29,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605365029] [2020-10-26 22:39:29,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:29,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:39:29,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511299229] [2020-10-26 22:39:29,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:39:29,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:29,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:39:29,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:39:29,352 INFO L87 Difference]: Start difference. First operand 10054 states and 13364 transitions. Second operand 5 states. [2020-10-26 22:39:30,283 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 22:39:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:32,934 INFO L93 Difference]: Finished difference Result 20114 states and 26907 transitions. [2020-10-26 22:39:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:39:32,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 308 [2020-10-26 22:39:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:32,970 INFO L225 Difference]: With dead ends: 20114 [2020-10-26 22:39:32,971 INFO L226 Difference]: Without dead ends: 10254 [2020-10-26 22:39:32,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:39:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10254 states. [2020-10-26 22:39:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10254 to 10234. [2020-10-26 22:39:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10234 states. [2020-10-26 22:39:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10234 states to 10234 states and 13188 transitions. [2020-10-26 22:39:33,256 INFO L78 Accepts]: Start accepts. Automaton has 10234 states and 13188 transitions. Word has length 308 [2020-10-26 22:39:33,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:33,257 INFO L481 AbstractCegarLoop]: Abstraction has 10234 states and 13188 transitions. [2020-10-26 22:39:33,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:39:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 10234 states and 13188 transitions. [2020-10-26 22:39:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-10-26 22:39:33,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:33,270 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:33,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 22:39:33,270 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash -869239834, now seen corresponding path program 1 times [2020-10-26 22:39:33,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:33,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134059290] [2020-10-26 22:39:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:33,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:33,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:33,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:36,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:38,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:38,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-26 22:39:38,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:39:38,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 22:39:38,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:38,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 22:39:38,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:39:38,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 293 [2020-10-26 22:39:38,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:38,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:38,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:38,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:38,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:38,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:38,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:39:38,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:38,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:38,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:38,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:39:38,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:38,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:38,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:38,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:38,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:38,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:39:38,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:38,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 22:39:38,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:38,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:38,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:38,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:39:38,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:38,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:39:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:38,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:38,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:39,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:39,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 22:39:39,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:39,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-26 22:39:39,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:39,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:39,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:39,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 22:39:39,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:39,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 22:39:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:39,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:39,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:39,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 22:39:39,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:39,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 22:39:39,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:39,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 22:39:39,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 164 proven. 159 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-26 22:39:39,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134059290] [2020-10-26 22:39:39,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:39,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:39,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735611848] [2020-10-26 22:39:39,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:39:39,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:39,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:39:39,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:39:39,629 INFO L87 Difference]: Start difference. First operand 10234 states and 13188 transitions. Second operand 8 states. [2020-10-26 22:39:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:42,980 INFO L93 Difference]: Finished difference Result 17336 states and 22781 transitions. [2020-10-26 22:39:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:39:42,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 345 [2020-10-26 22:39:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:43,007 INFO L225 Difference]: With dead ends: 17336 [2020-10-26 22:39:43,007 INFO L226 Difference]: Without dead ends: 9794 [2020-10-26 22:39:43,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:39:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9794 states. [2020-10-26 22:39:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9794 to 9784. [2020-10-26 22:39:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9784 states. [2020-10-26 22:39:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9784 states to 9784 states and 11669 transitions. [2020-10-26 22:39:43,216 INFO L78 Accepts]: Start accepts. Automaton has 9784 states and 11669 transitions. Word has length 345 [2020-10-26 22:39:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:43,217 INFO L481 AbstractCegarLoop]: Abstraction has 9784 states and 11669 transitions. [2020-10-26 22:39:43,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:39:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 9784 states and 11669 transitions. [2020-10-26 22:39:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-26 22:39:43,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:43,232 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:43,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 22:39:43,233 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1868208402, now seen corresponding path program 1 times [2020-10-26 22:39:43,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:43,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175217012] [2020-10-26 22:39:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:43,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:43,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:45,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:45,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 363 [2020-10-26 22:39:45,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:45,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1988 [2020-10-26 22:39:45,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 224 [2020-10-26 22:39:45,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:39:45,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:45,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:45,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:45,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:45,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:45,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:45,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:39:45,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:45,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:45,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:45,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:45,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:45,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:45,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:45,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:45,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:39:45,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:45,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 22:39:45,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:45,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:45,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:39:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:45,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:45,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:45,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 22:39:45,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:45,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 22:39:45,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:45,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:45,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:45,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:39:45,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:45,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-26 22:39:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:45,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:45,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:45,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:39:45,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:45,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 22:39:45,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:45,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:45,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:45,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:39:45,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 22:39:46,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175217012] [2020-10-26 22:39:46,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:46,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:46,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225275717] [2020-10-26 22:39:46,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:46,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:46,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:46,076 INFO L87 Difference]: Start difference. First operand 9784 states and 11669 transitions. Second operand 7 states. [2020-10-26 22:39:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:49,667 INFO L93 Difference]: Finished difference Result 17084 states and 20571 transitions. [2020-10-26 22:39:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:39:49,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 347 [2020-10-26 22:39:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:49,696 INFO L225 Difference]: With dead ends: 17084 [2020-10-26 22:39:49,696 INFO L226 Difference]: Without dead ends: 9992 [2020-10-26 22:39:49,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:39:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9992 states. [2020-10-26 22:39:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9992 to 9980. [2020-10-26 22:39:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9980 states. [2020-10-26 22:39:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9980 states to 9980 states and 11898 transitions. [2020-10-26 22:39:49,906 INFO L78 Accepts]: Start accepts. Automaton has 9980 states and 11898 transitions. Word has length 347 [2020-10-26 22:39:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:49,907 INFO L481 AbstractCegarLoop]: Abstraction has 9980 states and 11898 transitions. [2020-10-26 22:39:49,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 9980 states and 11898 transitions. [2020-10-26 22:39:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-26 22:39:49,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:49,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:49,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 22:39:49,921 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash -458841971, now seen corresponding path program 1 times [2020-10-26 22:39:49,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:49,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084345359] [2020-10-26 22:39:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:50,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:50,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:50,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:50,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:50,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:50,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-26 22:39:50,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:39:50,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 740 [2020-10-26 22:39:50,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:39:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 297 [2020-10-26 22:39:50,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:50,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:50,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:50,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:50,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:50,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:50,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 22:39:50,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:50,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:50,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:39:50,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:50,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:50,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:51,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:51,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:39:51,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 22:39:51,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 22:39:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:51,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:39:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:51,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:51,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:51,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:51,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:39:51,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:51,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 22:39:51,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:51,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:51,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-10-26 22:39:51,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:39:51,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-26 22:39:51,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084345359] [2020-10-26 22:39:51,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:39:51,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 22:39:51,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171685418] [2020-10-26 22:39:51,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:39:51,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:39:51,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:39:51,432 INFO L87 Difference]: Start difference. First operand 9980 states and 11898 transitions. Second operand 5 states. [2020-10-26 22:39:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:53,007 INFO L93 Difference]: Finished difference Result 17265 states and 20753 transitions. [2020-10-26 22:39:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:39:53,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 352 [2020-10-26 22:39:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:53,036 INFO L225 Difference]: With dead ends: 17265 [2020-10-26 22:39:53,037 INFO L226 Difference]: Without dead ends: 9977 [2020-10-26 22:39:53,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:39:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9977 states. [2020-10-26 22:39:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9977 to 9967. [2020-10-26 22:39:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9967 states. [2020-10-26 22:39:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 11854 transitions. [2020-10-26 22:39:53,224 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 11854 transitions. Word has length 352 [2020-10-26 22:39:53,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:53,225 INFO L481 AbstractCegarLoop]: Abstraction has 9967 states and 11854 transitions. [2020-10-26 22:39:53,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:39:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 11854 transitions. [2020-10-26 22:39:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-26 22:39:53,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:53,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:39:53,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 22:39:53,239 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1995531738, now seen corresponding path program 1 times [2020-10-26 22:39:53,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:53,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824123955] [2020-10-26 22:39:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:53,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:53,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:56,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:56,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 389 [2020-10-26 22:39:56,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:39:56,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2868 [2020-10-26 22:39:56,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:56,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:39:56,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:39:56,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-26 22:39:56,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:56,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:56,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:56,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:56,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:56,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:56,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:39:56,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:56,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:56,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:56,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:56,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:39:56,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:56,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 22:39:56,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:56,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:39:56,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:56,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:39:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:56,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:56,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:56,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:39:56,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:56,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 22:39:56,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:56,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:39:56,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:56,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 22:39:56,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 238 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:39:57,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824123955] [2020-10-26 22:39:57,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:57,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:39:57,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527362245] [2020-10-26 22:39:57,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:39:57,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:39:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:39:57,117 INFO L87 Difference]: Start difference. First operand 9967 states and 11854 transitions. Second operand 8 states. [2020-10-26 22:39:59,327 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:40:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:00,883 INFO L93 Difference]: Finished difference Result 18231 states and 21934 transitions. [2020-10-26 22:40:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:40:00,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 375 [2020-10-26 22:40:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:00,910 INFO L225 Difference]: With dead ends: 18231 [2020-10-26 22:40:00,911 INFO L226 Difference]: Without dead ends: 10937 [2020-10-26 22:40:00,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:40:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10937 states. [2020-10-26 22:40:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10937 to 10923. [2020-10-26 22:40:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10923 states. [2020-10-26 22:40:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10923 states to 10923 states and 13052 transitions. [2020-10-26 22:40:01,140 INFO L78 Accepts]: Start accepts. Automaton has 10923 states and 13052 transitions. Word has length 375 [2020-10-26 22:40:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:01,141 INFO L481 AbstractCegarLoop]: Abstraction has 10923 states and 13052 transitions. [2020-10-26 22:40:01,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:40:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 10923 states and 13052 transitions. [2020-10-26 22:40:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-26 22:40:01,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:01,159 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:40:01,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 22:40:01,160 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2042415900, now seen corresponding path program 1 times [2020-10-26 22:40:01,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:01,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297872566] [2020-10-26 22:40:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:01,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:01,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:03,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:04,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:06,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:06,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 411 [2020-10-26 22:40:06,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:40:06,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4926 [2020-10-26 22:40:06,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:06,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 22:40:06,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:40:06,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 402 [2020-10-26 22:40:06,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:06,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:06,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:06,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:06,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:06,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:06,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:40:06,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:40:06,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:06,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:06,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:06,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:06,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:40:06,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:06,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 22:40:06,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:06,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:06,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:06,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 22:40:06,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:06,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:40:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:06,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:06,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:06,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 22:40:06,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:06,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 22:40:06,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:06,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:40:06,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:06,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-26 22:40:06,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:06,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-26 22:40:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:07,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:07,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 22:40:07,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:07,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-26 22:40:07,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:07,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:07,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:07,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 22:40:07,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 93 proven. 238 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-10-26 22:40:07,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297872566] [2020-10-26 22:40:07,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:07,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 22:40:07,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859392364] [2020-10-26 22:40:07,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 22:40:07,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:07,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 22:40:07,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:40:07,407 INFO L87 Difference]: Start difference. First operand 10923 states and 13052 transitions. Second operand 10 states. [2020-10-26 22:40:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:15,243 INFO L93 Difference]: Finished difference Result 26787 states and 32698 transitions. [2020-10-26 22:40:15,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 22:40:15,244 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 395 [2020-10-26 22:40:15,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:15,295 INFO L225 Difference]: With dead ends: 26787 [2020-10-26 22:40:15,295 INFO L226 Difference]: Without dead ends: 17588 [2020-10-26 22:40:15,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-26 22:40:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17588 states. [2020-10-26 22:40:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17588 to 17087. [2020-10-26 22:40:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17087 states. [2020-10-26 22:40:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17087 states to 17087 states and 20195 transitions. [2020-10-26 22:40:15,666 INFO L78 Accepts]: Start accepts. Automaton has 17087 states and 20195 transitions. Word has length 395 [2020-10-26 22:40:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:15,667 INFO L481 AbstractCegarLoop]: Abstraction has 17087 states and 20195 transitions. [2020-10-26 22:40:15,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 22:40:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17087 states and 20195 transitions. [2020-10-26 22:40:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-10-26 22:40:15,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:15,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:40:15,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 22:40:15,682 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:15,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1816561338, now seen corresponding path program 1 times [2020-10-26 22:40:15,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:15,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063743169] [2020-10-26 22:40:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:15,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:15,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:17,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:17,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-10-26 22:40:17,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:17,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1980 [2020-10-26 22:40:17,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:17,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:17,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:40:17,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-26 22:40:17,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:17,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:17,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:17,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:17,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:17,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:40:17,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:17,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:17,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:17,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:17,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:40:17,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:17,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 22:40:17,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:17,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:17,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:18,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:40:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:18,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:18,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:18,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:40:18,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:18,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 22:40:18,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:18,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:18,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:18,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:40:18,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:18,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:40:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:18,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:18,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:18,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:40:18,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:18,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 22:40:18,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:18,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:18,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:18,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:40:18,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:40:18,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063743169] [2020-10-26 22:40:18,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:18,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:40:18,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350762316] [2020-10-26 22:40:18,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:40:18,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:18,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:40:18,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:40:18,361 INFO L87 Difference]: Start difference. First operand 17087 states and 20195 transitions. Second operand 7 states. [2020-10-26 22:40:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:22,449 INFO L93 Difference]: Finished difference Result 33420 states and 39800 transitions. [2020-10-26 22:40:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:40:22,455 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 399 [2020-10-26 22:40:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:22,507 INFO L225 Difference]: With dead ends: 33420 [2020-10-26 22:40:22,507 INFO L226 Difference]: Without dead ends: 19035 [2020-10-26 22:40:22,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:40:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19035 states. [2020-10-26 22:40:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19035 to 19002. [2020-10-26 22:40:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19002 states. [2020-10-26 22:40:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19002 states to 19002 states and 22294 transitions. [2020-10-26 22:40:22,925 INFO L78 Accepts]: Start accepts. Automaton has 19002 states and 22294 transitions. Word has length 399 [2020-10-26 22:40:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:22,926 INFO L481 AbstractCegarLoop]: Abstraction has 19002 states and 22294 transitions. [2020-10-26 22:40:22,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:40:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 19002 states and 22294 transitions. [2020-10-26 22:40:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-10-26 22:40:22,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:22,944 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:40:22,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 22:40:22,945 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:22,945 INFO L82 PathProgramCache]: Analyzing trace with hash 97277498, now seen corresponding path program 1 times [2020-10-26 22:40:22,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:22,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799696564] [2020-10-26 22:40:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:23,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:23,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:23,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 442 [2020-10-26 22:40:23,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:40:23,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-26 22:40:23,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 378 [2020-10-26 22:40:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 22:40:23,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:24,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:24,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:24,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:24,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:24,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:24,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:40:24,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:24,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:24,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:24,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:24,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:24,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:40:24,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:24,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 22:40:24,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:24,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:24,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:24,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:24,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:24,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:40:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:24,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:24,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:24,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 22:40:24,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:24,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:40:24,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:24,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:24,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:24,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:24,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:24,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-26 22:40:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:24,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:24,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:24,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-26 22:40:24,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:24,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 22:40:24,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:24,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:24,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:24,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-26 22:40:24,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 165 proven. 3 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-10-26 22:40:24,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799696564] [2020-10-26 22:40:24,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:24,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:40:24,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999338690] [2020-10-26 22:40:24,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:40:24,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:40:24,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:40:24,817 INFO L87 Difference]: Start difference. First operand 19002 states and 22294 transitions. Second operand 6 states. [2020-10-26 22:40:26,542 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-26 22:40:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:27,283 INFO L93 Difference]: Finished difference Result 35348 states and 41620 transitions. [2020-10-26 22:40:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:40:27,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 426 [2020-10-26 22:40:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:27,327 INFO L225 Difference]: With dead ends: 35348 [2020-10-26 22:40:27,328 INFO L226 Difference]: Without dead ends: 19024 [2020-10-26 22:40:27,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:40:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19024 states. [2020-10-26 22:40:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19024 to 18998. [2020-10-26 22:40:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18998 states. [2020-10-26 22:40:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18998 states to 18998 states and 22264 transitions. [2020-10-26 22:40:27,864 INFO L78 Accepts]: Start accepts. Automaton has 18998 states and 22264 transitions. Word has length 426 [2020-10-26 22:40:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:27,865 INFO L481 AbstractCegarLoop]: Abstraction has 18998 states and 22264 transitions. [2020-10-26 22:40:27,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:40:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 18998 states and 22264 transitions. [2020-10-26 22:40:27,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2020-10-26 22:40:27,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:27,882 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:40:27,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 22:40:27,882 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:27,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:27,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2104532639, now seen corresponding path program 1 times [2020-10-26 22:40:27,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:27,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344504912] [2020-10-26 22:40:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:28,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:28,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:29,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:29,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 443 [2020-10-26 22:40:29,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:40:29,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1599 [2020-10-26 22:40:29,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:29,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:29,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-10-26 22:40:29,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 22:40:29,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:29,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:29,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:29,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:29,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:29,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:40:29,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:29,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:29,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:29,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:29,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:29,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:29,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:29,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:29,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:40:29,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:29,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 22:40:29,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:29,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:29,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:29,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:29,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:29,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:40:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:29,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:30,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:30,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 22:40:30,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:30,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 22:40:30,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:30,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:30,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:30,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-26 22:40:30,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:30,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-10-26 22:40:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:30,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:30,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:30,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 22:40:30,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:30,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 22:40:30,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:30,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:30,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:30,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-26 22:40:30,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 353 proven. 2 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-26 22:40:30,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344504912] [2020-10-26 22:40:30,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:30,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:40:30,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519832472] [2020-10-26 22:40:30,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:40:30,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:30,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:40:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:40:30,423 INFO L87 Difference]: Start difference. First operand 18998 states and 22264 transitions. Second operand 7 states. [2020-10-26 22:40:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:34,801 INFO L93 Difference]: Finished difference Result 40372 states and 47600 transitions. [2020-10-26 22:40:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:40:34,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 427 [2020-10-26 22:40:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:34,843 INFO L225 Difference]: With dead ends: 40372 [2020-10-26 22:40:34,843 INFO L226 Difference]: Without dead ends: 21564 [2020-10-26 22:40:34,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:40:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21564 states. [2020-10-26 22:40:35,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21564 to 21504. [2020-10-26 22:40:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21504 states. [2020-10-26 22:40:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21504 states to 21504 states and 24904 transitions. [2020-10-26 22:40:35,329 INFO L78 Accepts]: Start accepts. Automaton has 21504 states and 24904 transitions. Word has length 427 [2020-10-26 22:40:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:35,330 INFO L481 AbstractCegarLoop]: Abstraction has 21504 states and 24904 transitions. [2020-10-26 22:40:35,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:40:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 21504 states and 24904 transitions. [2020-10-26 22:40:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-10-26 22:40:35,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:35,359 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:40:35,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 22:40:35,359 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:35,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1764148494, now seen corresponding path program 1 times [2020-10-26 22:40:35,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:35,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483880942] [2020-10-26 22:40:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:35,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:35,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:37,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:38,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:40,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:40,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 479 [2020-10-26 22:40:40,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:40:40,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-26 22:40:40,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:40,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:40,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-26 22:40:40,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:40:40,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:40,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:40,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:40,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:40,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:40,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:40,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:40:40,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:40,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:40,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:40,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:40,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:40,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:40,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:40,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:40,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:40:40,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:40,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 22:40:40,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:40,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:40,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 22:40:40,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:40,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:40:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:40,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:41,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:41,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:40:41,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:41,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 22:40:41,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:41,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:41,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:41,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:40:41,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:41,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2020-10-26 22:40:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:41,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:41,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:41,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:40:41,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:41,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 22:40:41,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:41,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:41,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:40:41,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:41,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 272 proven. 108 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-26 22:40:41,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483880942] [2020-10-26 22:40:41,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:41,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:40:41,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954654532] [2020-10-26 22:40:41,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:40:41,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:41,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:40:41,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:40:41,442 INFO L87 Difference]: Start difference. First operand 21504 states and 24904 transitions. Second operand 7 states. [2020-10-26 22:40:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:44,948 INFO L93 Difference]: Finished difference Result 45901 states and 53171 transitions. [2020-10-26 22:40:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:40:44,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 463 [2020-10-26 22:40:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:44,997 INFO L225 Difference]: With dead ends: 45901 [2020-10-26 22:40:44,997 INFO L226 Difference]: Without dead ends: 24781 [2020-10-26 22:40:45,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:40:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24781 states. [2020-10-26 22:40:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24781 to 24155. [2020-10-26 22:40:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24155 states. [2020-10-26 22:40:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24155 states to 24155 states and 27671 transitions. [2020-10-26 22:40:45,494 INFO L78 Accepts]: Start accepts. Automaton has 24155 states and 27671 transitions. Word has length 463 [2020-10-26 22:40:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:45,494 INFO L481 AbstractCegarLoop]: Abstraction has 24155 states and 27671 transitions. [2020-10-26 22:40:45,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:40:45,495 INFO L276 IsEmpty]: Start isEmpty. Operand 24155 states and 27671 transitions. [2020-10-26 22:40:45,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-10-26 22:40:45,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:45,510 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:40:45,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 22:40:45,511 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:45,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:45,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1650397309, now seen corresponding path program 1 times [2020-10-26 22:40:45,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:45,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26743795] [2020-10-26 22:40:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:45,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:45,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:47,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:50,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:50,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 484 [2020-10-26 22:40:50,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:40:50,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 22:40:50,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:50,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:40:50,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 22:40:50,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:50,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:40:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:50,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:50,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:50,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:40:50,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:50,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:40:50,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:50,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:50,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:50,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:50,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:50,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:40:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:50,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:50,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:50,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:40:50,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:50,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 22:40:50,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:50,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:40:50,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:40:50,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:40:50,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:50,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:40:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:50,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:51,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:51,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:40:51,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:51,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 22:40:51,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:51,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:40:51,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:40:51,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:40:51,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:51,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-10-26 22:40:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:51,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:51,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:40:51,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:40:51,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:40:51,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 22:40:51,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:40:51,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:40:51,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:40:51,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:40:51,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:40:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 272 proven. 108 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-10-26 22:40:51,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26743795] [2020-10-26 22:40:51,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:40:51,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:40:51,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187728547] [2020-10-26 22:40:51,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:40:51,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:40:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:40:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:40:51,555 INFO L87 Difference]: Start difference. First operand 24155 states and 27671 transitions. Second operand 7 states. [2020-10-26 22:40:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:40:56,896 INFO L93 Difference]: Finished difference Result 47577 states and 54536 transitions. [2020-10-26 22:40:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:40:56,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 468 [2020-10-26 22:40:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:40:56,974 INFO L225 Difference]: With dead ends: 47577 [2020-10-26 22:40:56,974 INFO L226 Difference]: Without dead ends: 26506 [2020-10-26 22:40:57,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:40:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26506 states. [2020-10-26 22:40:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26506 to 25491. [2020-10-26 22:40:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25491 states. [2020-10-26 22:40:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25491 states to 25491 states and 29041 transitions. [2020-10-26 22:40:57,512 INFO L78 Accepts]: Start accepts. Automaton has 25491 states and 29041 transitions. Word has length 468 [2020-10-26 22:40:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:40:57,513 INFO L481 AbstractCegarLoop]: Abstraction has 25491 states and 29041 transitions. [2020-10-26 22:40:57,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:40:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 25491 states and 29041 transitions. [2020-10-26 22:40:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-10-26 22:40:57,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:40:57,531 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:40:57,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 22:40:57,532 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:40:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:40:57,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1193706898, now seen corresponding path program 1 times [2020-10-26 22:40:57,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:40:57,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736850585] [2020-10-26 22:40:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:40:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:40:57,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:58,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:58,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:40:58,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:02,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:02,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 500 [2020-10-26 22:41:02,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:41:02,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 22:41:02,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:41:02,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:41:02,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:02,844 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:41:02,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:02,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:02,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:02,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:02,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:41:02,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:02,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:02,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:02,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:02,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:41:02,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:02,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 22:41:02,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:02,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:02,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:02,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:41:02,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:03,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:41:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:03,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:03,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:03,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:41:03,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:03,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 22:41:03,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:41:03,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:03,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-10-26 22:41:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:03,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:03,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:03,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:41:03,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:03,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 22:41:03,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:03,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:03,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:41:03,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:03,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 272 proven. 108 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 22:41:03,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736850585] [2020-10-26 22:41:03,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:03,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:41:03,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64260528] [2020-10-26 22:41:03,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:03,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:03,625 INFO L87 Difference]: Start difference. First operand 25491 states and 29041 transitions. Second operand 7 states. [2020-10-26 22:41:05,850 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-26 22:41:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:07,435 INFO L93 Difference]: Finished difference Result 48163 states and 54986 transitions. [2020-10-26 22:41:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:41:07,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 484 [2020-10-26 22:41:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:07,496 INFO L225 Difference]: With dead ends: 48163 [2020-10-26 22:41:07,496 INFO L226 Difference]: Without dead ends: 25748 [2020-10-26 22:41:07,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:41:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25748 states. [2020-10-26 22:41:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25748 to 25307. [2020-10-26 22:41:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25307 states. [2020-10-26 22:41:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25307 states to 25307 states and 28739 transitions. [2020-10-26 22:41:08,081 INFO L78 Accepts]: Start accepts. Automaton has 25307 states and 28739 transitions. Word has length 484 [2020-10-26 22:41:08,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:08,082 INFO L481 AbstractCegarLoop]: Abstraction has 25307 states and 28739 transitions. [2020-10-26 22:41:08,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:41:08,082 INFO L276 IsEmpty]: Start isEmpty. Operand 25307 states and 28739 transitions. [2020-10-26 22:41:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2020-10-26 22:41:08,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:08,101 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:08,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 22:41:08,101 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:08,102 INFO L82 PathProgramCache]: Analyzing trace with hash -748144426, now seen corresponding path program 1 times [2020-10-26 22:41:08,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:08,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389945725] [2020-10-26 22:41:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:08,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:08,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:09,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:09,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:13,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:13,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 555 [2020-10-26 22:41:13,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:41:13,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 22:41:13,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:13,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:13,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-26 22:41:13,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 22:41:13,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:13,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:13,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:13,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:13,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:13,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:13,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:41:13,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:13,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:13,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:13,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:13,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:13,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:13,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:13,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:13,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:41:13,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 22:41:13,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:13,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:41:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:13,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:13,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:13,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 22:41:13,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:13,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 22:41:13,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:13,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:13,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:41:13,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:13,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 22:41:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:13,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:13,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:13,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:13,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:41:13,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:41:13,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-26 22:41:13,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:13,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:13,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:13,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:41:13,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:14,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 317 [2020-10-26 22:41:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:14,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:14,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:14,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:41:14,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:14,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 22:41:14,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:41:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:14,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 416 proven. 108 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2020-10-26 22:41:14,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389945725] [2020-10-26 22:41:14,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:14,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:41:14,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792699803] [2020-10-26 22:41:14,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:14,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:14,421 INFO L87 Difference]: Start difference. First operand 25307 states and 28739 transitions. Second operand 7 states. [2020-10-26 22:41:15,788 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-26 22:41:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:17,569 INFO L93 Difference]: Finished difference Result 47225 states and 53788 transitions. [2020-10-26 22:41:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:41:17,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 537 [2020-10-26 22:41:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:17,622 INFO L225 Difference]: With dead ends: 47225 [2020-10-26 22:41:17,622 INFO L226 Difference]: Without dead ends: 25371 [2020-10-26 22:41:17,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:41:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25371 states. [2020-10-26 22:41:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25371 to 25305. [2020-10-26 22:41:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25305 states. [2020-10-26 22:41:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25305 states to 25305 states and 28720 transitions. [2020-10-26 22:41:18,067 INFO L78 Accepts]: Start accepts. Automaton has 25305 states and 28720 transitions. Word has length 537 [2020-10-26 22:41:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:18,068 INFO L481 AbstractCegarLoop]: Abstraction has 25305 states and 28720 transitions. [2020-10-26 22:41:18,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:41:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 25305 states and 28720 transitions. [2020-10-26 22:41:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2020-10-26 22:41:18,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:18,091 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:41:18,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 22:41:18,091 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:18,092 INFO L82 PathProgramCache]: Analyzing trace with hash 606413646, now seen corresponding path program 1 times [2020-10-26 22:41:18,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:18,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218658650] [2020-10-26 22:41:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:18,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:20,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:21,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:23,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:23,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 582 [2020-10-26 22:41:23,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:41:23,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 22:41:23,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-26 22:41:23,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:41:23,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:23,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:23,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:23,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:23,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:23,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:23,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:41:23,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:23,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:23,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:23,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:23,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:23,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:23,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:23,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:23,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:41:23,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 22:41:23,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:23,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:23,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:41:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:23,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:23,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:23,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:41:23,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 22:41:23,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 22:41:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:23,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-10-26 22:41:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:23,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:23,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:23,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:41:23,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:23,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 22:41:23,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:23,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:23,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:23,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:41:23,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:23,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-10-26 22:41:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:23,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:23,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:23,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:41:23,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:23,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 22:41:23,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:41:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:23,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 433 proven. 108 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2020-10-26 22:41:24,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218658650] [2020-10-26 22:41:24,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:24,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:41:24,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523034705] [2020-10-26 22:41:24,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:24,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:24,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:24,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:24,221 INFO L87 Difference]: Start difference. First operand 25305 states and 28720 transitions. Second operand 7 states. [2020-10-26 22:41:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:29,227 INFO L93 Difference]: Finished difference Result 46968 states and 53473 transitions. [2020-10-26 22:41:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:41:29,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 564 [2020-10-26 22:41:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:29,265 INFO L225 Difference]: With dead ends: 46968 [2020-10-26 22:41:29,265 INFO L226 Difference]: Without dead ends: 22257 [2020-10-26 22:41:29,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:41:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22257 states. [2020-10-26 22:41:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22257 to 21435. [2020-10-26 22:41:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21435 states. [2020-10-26 22:41:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21435 states to 21435 states and 23845 transitions. [2020-10-26 22:41:29,604 INFO L78 Accepts]: Start accepts. Automaton has 21435 states and 23845 transitions. Word has length 564 [2020-10-26 22:41:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:41:29,605 INFO L481 AbstractCegarLoop]: Abstraction has 21435 states and 23845 transitions. [2020-10-26 22:41:29,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:41:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 21435 states and 23845 transitions. [2020-10-26 22:41:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2020-10-26 22:41:29,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:41:29,624 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2020-10-26 22:41:29,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 22:41:29,624 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:41:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:41:29,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2054715768, now seen corresponding path program 1 times [2020-10-26 22:41:29,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:41:29,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190226065] [2020-10-26 22:41:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:41:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:29,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:30,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:30,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:34,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:34,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 624 [2020-10-26 22:41:34,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:41:34,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 22:41:34,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:34,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:34,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-10-26 22:41:34,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:41:34,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:34,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:41:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:34,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:34,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:41:34,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:34,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:41:34,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:34,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:34,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:34,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:34,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:34,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:41:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:34,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:35,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:35,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:41:35,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:35,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 22:41:35,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:35,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:35,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:35,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:41:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:35,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:35,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:35,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:41:35,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:35,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-26 22:41:35,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:41:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:41:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:41:35,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:35,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-10-26 22:41:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:35,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:35,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:35,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:41:35,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:35,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 22:41:35,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:35,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:41:35,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:41:35,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:41:35,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:35,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-10-26 22:41:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:41:35,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:41:35,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:41:35,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:41:35,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:41:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 22:41:35,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:41:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:41:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:41:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:41:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:41:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 441 proven. 108 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-26 22:41:35,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190226065] [2020-10-26 22:41:35,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:41:35,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:41:35,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142612380] [2020-10-26 22:41:35,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:41:35,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:41:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:41:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:41:35,959 INFO L87 Difference]: Start difference. First operand 21435 states and 23845 transitions. Second operand 7 states. [2020-10-26 22:41:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:41:40,027 INFO L93 Difference]: Finished difference Result 42374 states and 47129 transitions. [2020-10-26 22:41:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:41:40,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 606 [2020-10-26 22:41:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:41:40,071 INFO L225 Difference]: With dead ends: 42374 [2020-10-26 22:41:40,072 INFO L226 Difference]: Without dead ends: 21323 [2020-10-26 22:41:40,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:41:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21323 states.