/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/Problem03_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:48:10,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:48:10,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:48:10,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:48:10,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:48:10,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:48:10,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:48:10,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:48:10,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:48:10,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:48:10,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:48:10,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:48:10,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:48:10,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:48:10,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:48:10,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:48:10,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:48:10,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:48:10,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:48:10,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:48:10,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:48:10,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:48:10,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:48:10,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:48:10,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:48:10,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:48:10,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:48:10,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:48:10,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:48:10,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:48:10,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:48:10,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:48:10,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:48:10,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:48:10,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:48:10,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:48:10,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:48:10,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:48:10,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:48:10,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:48:10,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:48:10,413 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 20:48:10,440 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:48:10,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:48:10,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:48:10,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:48:10,443 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:48:10,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:48:10,443 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:48:10,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:48:10,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:48:10,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:48:10,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:48:10,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:48:10,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:48:10,445 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:48:10,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:48:10,447 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:48:10,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:48:10,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:48:10,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:48:10,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:48:10,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:48:10,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:48:10,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:48:10,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:48:10,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:48:10,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:48:10,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:48:10,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:48:10,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:48:10,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:48:10,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:48:10,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:48:10,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:48:10,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:48:10,935 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:48:10,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2020-10-26 20:48:11,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6d7df622/92f6a52feadb433fbc11626ee3f23f5c/FLAG38c8815db [2020-10-26 20:48:11,960 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:48:11,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2020-10-26 20:48:11,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6d7df622/92f6a52feadb433fbc11626ee3f23f5c/FLAG38c8815db [2020-10-26 20:48:12,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6d7df622/92f6a52feadb433fbc11626ee3f23f5c [2020-10-26 20:48:12,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:48:12,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:48:12,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:12,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:48:12,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:48:12,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:12" (1/1) ... [2020-10-26 20:48:12,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a23255c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:12, skipping insertion in model container [2020-10-26 20:48:12,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:12" (1/1) ... [2020-10-26 20:48:12,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:48:12,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:48:12,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:12,974 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:48:13,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:13,265 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:48:13,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13 WrapperNode [2020-10-26 20:48:13,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:13,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:48:13,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:48:13,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:48:13,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13" (1/1) ... [2020-10-26 20:48:13,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13" (1/1) ... [2020-10-26 20:48:13,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13" (1/1) ... [2020-10-26 20:48:13,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13" (1/1) ... [2020-10-26 20:48:13,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13" (1/1) ... [2020-10-26 20:48:13,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13" (1/1) ... [2020-10-26 20:48:13,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13" (1/1) ... [2020-10-26 20:48:13,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:48:13,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:48:13,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:48:13,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:48:13,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13" (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 20:48:13,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:48:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:48:13,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:48:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:48:13,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:48:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:48:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:48:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:48:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:48:13,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:48:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:48:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:48:13,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:48:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:48:13,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:48:13,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:48:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:48:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:48:13,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:48:15,911 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:48:15,912 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:48:15,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:15 BoogieIcfgContainer [2020-10-26 20:48:15,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:48:15,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:48:15,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:48:15,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:48:15,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:48:12" (1/3) ... [2020-10-26 20:48:15,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf407da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:15, skipping insertion in model container [2020-10-26 20:48:15,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:13" (2/3) ... [2020-10-26 20:48:15,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf407da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:15, skipping insertion in model container [2020-10-26 20:48:15,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:15" (3/3) ... [2020-10-26 20:48:15,926 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label31.c [2020-10-26 20:48:15,938 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:48:15,944 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:48:15,958 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:48:16,002 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:48:16,003 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:48:16,003 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:48:16,003 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:48:16,003 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:48:16,003 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:48:16,003 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:48:16,003 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:48:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:48:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-26 20:48:16,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:16,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:48:16,047 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1158069176, now seen corresponding path program 1 times [2020-10-26 20:48:16,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:16,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291332503] [2020-10-26 20:48:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:17,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:21,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:21,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 20:48:21,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:21,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 20:48:21,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:48:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:21,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:48:21,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:48:22,636 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 20:48:22,860 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-26 20:48:23,172 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-10-26 20:48:23,525 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 83 [2020-10-26 20:48:23,902 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 77 [2020-10-26 20:48:24,379 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 71 [2020-10-26 20:48:24,712 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 63 [2020-10-26 20:48:24,932 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-10-26 20:48:25,211 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:25,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:25,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:25,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:25,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:25,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 20:48:25,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:25,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:25,985 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 20:48:25,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291332503] [2020-10-26 20:48:25,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:25,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:48:25,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722714326] [2020-10-26 20:48:25,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:48:25,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:48:26,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:48:26,013 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:48:26,580 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 20:48:27,570 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 20:48:28,545 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 20:48:29,666 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 221 DAG size of output: 216 [2020-10-26 20:48:31,374 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 241 DAG size of output: 203 [2020-10-26 20:48:32,793 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 241 DAG size of output: 210 [2020-10-26 20:48:35,051 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 244 DAG size of output: 207 [2020-10-26 20:48:39,302 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 245 DAG size of output: 204 [2020-10-26 20:48:41,307 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 247 DAG size of output: 201 [2020-10-26 20:48:44,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:44,635 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:48:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:48:44,637 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 158 [2020-10-26 20:48:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:44,670 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:48:44,671 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:48:44,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:48:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:48:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:48:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:48:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:48:44,790 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 158 [2020-10-26 20:48:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:44,791 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:48:44,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:48:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:48:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-26 20:48:44,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:44,798 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:48:44,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:48:44,798 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash -358431115, now seen corresponding path program 1 times [2020-10-26 20:48:44,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:44,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515105888] [2020-10-26 20:48:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:44,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:45,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:46,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:49,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:49,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-26 20:48:49,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:48:49,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 20:48:49,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:49,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:49,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:49,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-26 20:48:49,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:50,349 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:50,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:50,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:50,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:50,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:50,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:50,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:48:50,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:50,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:50,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:50,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:50,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:50,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:50,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:48:50,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:50,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:48:50,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:50,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:48:50,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:48:50,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515105888] [2020-10-26 20:48:50,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:50,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:48:50,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290476077] [2020-10-26 20:48:50,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:48:50,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:50,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:48:50,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:48:50,611 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:48:50,855 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:53,988 INFO L93 Difference]: Finished difference Result 847 states and 1320 transitions. [2020-10-26 20:48:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:48:53,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2020-10-26 20:48:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:53,997 INFO L225 Difference]: With dead ends: 847 [2020-10-26 20:48:53,997 INFO L226 Difference]: Without dead ends: 603 [2020-10-26 20:48:53,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-26 20:48:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 587. [2020-10-26 20:48:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-26 20:48:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 880 transitions. [2020-10-26 20:48:54,064 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 880 transitions. Word has length 169 [2020-10-26 20:48:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:54,064 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 880 transitions. [2020-10-26 20:48:54,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:48:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 880 transitions. [2020-10-26 20:48:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 20:48:54,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:54,071 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:48:54,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:48:54,072 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:54,072 INFO L82 PathProgramCache]: Analyzing trace with hash 930114348, now seen corresponding path program 1 times [2020-10-26 20:48:54,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:54,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331948265] [2020-10-26 20:48:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:54,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:54,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:55,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:58,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:58,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:59,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:59,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 20:48:59,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:48:59,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4975 [2020-10-26 20:48:59,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:59,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:48:59,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:59,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:48:59,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:59,396 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:59,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:59,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:59,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:59,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:59,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:59,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:48:59,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:59,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:59,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:59,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:59,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:59,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:48:59,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:59,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:48:59,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:59,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:59,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:59,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:48:59,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:59,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:48:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:59,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:59,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:59,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:48:59,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:59,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:48:59,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:48:59,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 20:48:59,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331948265] [2020-10-26 20:48:59,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:59,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:48:59,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721843267] [2020-10-26 20:48:59,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:59,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:59,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:59,741 INFO L87 Difference]: Start difference. First operand 587 states and 880 transitions. Second operand 7 states. [2020-10-26 20:49:00,042 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:49:02,493 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:04,093 INFO L93 Difference]: Finished difference Result 1533 states and 2433 transitions. [2020-10-26 20:49:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:49:04,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 178 [2020-10-26 20:49:04,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:04,102 INFO L225 Difference]: With dead ends: 1533 [2020-10-26 20:49:04,102 INFO L226 Difference]: Without dead ends: 1067 [2020-10-26 20:49:04,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-10-26 20:49:04,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1038. [2020-10-26 20:49:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1038 states. [2020-10-26 20:49:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1598 transitions. [2020-10-26 20:49:04,154 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1598 transitions. Word has length 178 [2020-10-26 20:49:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:04,155 INFO L481 AbstractCegarLoop]: Abstraction has 1038 states and 1598 transitions. [2020-10-26 20:49:04,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1598 transitions. [2020-10-26 20:49:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-26 20:49:04,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:04,160 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:04,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:49:04,160 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1805947359, now seen corresponding path program 1 times [2020-10-26 20:49:04,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:04,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054340648] [2020-10-26 20:49:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:04,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:07,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-26 20:49:09,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:49:09,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 20:49:09,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:49:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:09,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-26 20:49:09,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,654 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:09,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:09,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:09,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:09,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:09,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,830 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:49:09,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:09,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:09,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:49:09,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:09,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:09,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:09,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:09,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:09,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:49:09,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:09,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:49:09,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:49:09,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:49:10,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054340648] [2020-10-26 20:49:10,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:10,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:10,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743102695] [2020-10-26 20:49:10,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:10,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:10,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:10,098 INFO L87 Difference]: Start difference. First operand 1038 states and 1598 transitions. Second operand 8 states. [2020-10-26 20:49:10,386 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:10,900 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:14,256 INFO L93 Difference]: Finished difference Result 2882 states and 4657 transitions. [2020-10-26 20:49:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:14,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 179 [2020-10-26 20:49:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:14,269 INFO L225 Difference]: With dead ends: 2882 [2020-10-26 20:49:14,270 INFO L226 Difference]: Without dead ends: 1965 [2020-10-26 20:49:14,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:49:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2020-10-26 20:49:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1924. [2020-10-26 20:49:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1924 states. [2020-10-26 20:49:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2897 transitions. [2020-10-26 20:49:14,371 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2897 transitions. Word has length 179 [2020-10-26 20:49:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:14,371 INFO L481 AbstractCegarLoop]: Abstraction has 1924 states and 2897 transitions. [2020-10-26 20:49:14,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2897 transitions. [2020-10-26 20:49:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-26 20:49:14,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:14,384 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:14,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:49:14,384 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:14,385 INFO L82 PathProgramCache]: Analyzing trace with hash 692408609, now seen corresponding path program 1 times [2020-10-26 20:49:14,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:14,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375683706] [2020-10-26 20:49:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:14,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:15,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:15,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-26 20:49:15,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:15,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-26 20:49:15,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:15,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:15,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:49:15,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-26 20:49:15,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:15,485 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:15,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:15,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:15,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:15,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:15,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:15,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:49:15,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:15,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:15,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:15,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:15,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:15,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:15,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:15,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:15,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:15,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:15,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:49:15,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:49:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:49:15,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375683706] [2020-10-26 20:49:15,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:15,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:49:15,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108128602] [2020-10-26 20:49:15,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:49:15,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:15,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:49:15,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:49:15,740 INFO L87 Difference]: Start difference. First operand 1924 states and 2897 transitions. Second operand 5 states. [2020-10-26 20:49:16,207 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:19,522 INFO L93 Difference]: Finished difference Result 5435 states and 8449 transitions. [2020-10-26 20:49:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:49:19,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-10-26 20:49:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:19,549 INFO L225 Difference]: With dead ends: 5435 [2020-10-26 20:49:19,550 INFO L226 Difference]: Without dead ends: 3632 [2020-10-26 20:49:19,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:49:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2020-10-26 20:49:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3611. [2020-10-26 20:49:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3611 states. [2020-10-26 20:49:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 4960 transitions. [2020-10-26 20:49:19,698 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 4960 transitions. Word has length 179 [2020-10-26 20:49:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:19,699 INFO L481 AbstractCegarLoop]: Abstraction has 3611 states and 4960 transitions. [2020-10-26 20:49:19,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:49:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 4960 transitions. [2020-10-26 20:49:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 20:49:19,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:19,711 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:19,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:49:19,711 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:19,712 INFO L82 PathProgramCache]: Analyzing trace with hash 60044168, now seen corresponding path program 1 times [2020-10-26 20:49:19,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:19,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551063740] [2020-10-26 20:49:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:19,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:20,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:23,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:24,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:24,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 20:49:24,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:24,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4669 [2020-10-26 20:49:24,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:24,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:24,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:24,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 20:49:24,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:24,742 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:24,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:24,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:24,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:24,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:24,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:49:24,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:24,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:24,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:24,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:24,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:24,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:24,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:24,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:24,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:24,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:24,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:49:24,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:24,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:24,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:24,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:24,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:24,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:24,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:25,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:25,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 20:49:25,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:25,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:49:25,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:25,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:25,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:25,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:49:25,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:49:25,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551063740] [2020-10-26 20:49:25,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:25,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:25,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063794304] [2020-10-26 20:49:25,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:25,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:25,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:25,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:25,087 INFO L87 Difference]: Start difference. First operand 3611 states and 4960 transitions. Second operand 8 states. [2020-10-26 20:49:25,372 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:29,158 INFO L93 Difference]: Finished difference Result 10738 states and 15209 transitions. [2020-10-26 20:49:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:49:29,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 187 [2020-10-26 20:49:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:29,204 INFO L225 Difference]: With dead ends: 10738 [2020-10-26 20:49:29,204 INFO L226 Difference]: Without dead ends: 7248 [2020-10-26 20:49:29,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:49:29,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7248 states. [2020-10-26 20:49:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7248 to 7147. [2020-10-26 20:49:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7147 states. [2020-10-26 20:49:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7147 states to 7147 states and 9905 transitions. [2020-10-26 20:49:29,460 INFO L78 Accepts]: Start accepts. Automaton has 7147 states and 9905 transitions. Word has length 187 [2020-10-26 20:49:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:29,460 INFO L481 AbstractCegarLoop]: Abstraction has 7147 states and 9905 transitions. [2020-10-26 20:49:29,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 7147 states and 9905 transitions. [2020-10-26 20:49:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-26 20:49:29,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:29,477 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:29,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:49:29,477 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:29,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1886232040, now seen corresponding path program 1 times [2020-10-26 20:49:29,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:29,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236914991] [2020-10-26 20:49:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:29,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:29,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:30,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:31,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:32,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-26 20:49:32,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:32,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3343 [2020-10-26 20:49:32,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:32,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:49:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:32,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-10-26 20:49:32,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:33,191 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:33,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:33,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:33,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:33,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:33,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:33,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:49:33,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:33,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:33,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:33,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:33,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:33,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:33,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:49:33,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:33,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:33,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:33,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:33,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:49:33,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:49:33,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:49:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 20:49:33,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236914991] [2020-10-26 20:49:33,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:33,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:49:33,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065429224] [2020-10-26 20:49:33,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:49:33,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:33,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:49:33,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:49:33,541 INFO L87 Difference]: Start difference. First operand 7147 states and 9905 transitions. Second operand 6 states. [2020-10-26 20:49:33,818 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:37,122 INFO L93 Difference]: Finished difference Result 21214 states and 30325 transitions. [2020-10-26 20:49:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:49:37,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 188 [2020-10-26 20:49:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:37,195 INFO L225 Difference]: With dead ends: 21214 [2020-10-26 20:49:37,195 INFO L226 Difference]: Without dead ends: 14188 [2020-10-26 20:49:37,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14188 states. [2020-10-26 20:49:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14188 to 14108. [2020-10-26 20:49:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14108 states. [2020-10-26 20:49:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14108 states to 14108 states and 19515 transitions. [2020-10-26 20:49:37,733 INFO L78 Accepts]: Start accepts. Automaton has 14108 states and 19515 transitions. Word has length 188 [2020-10-26 20:49:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:37,734 INFO L481 AbstractCegarLoop]: Abstraction has 14108 states and 19515 transitions. [2020-10-26 20:49:37,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:49:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 14108 states and 19515 transitions. [2020-10-26 20:49:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 20:49:37,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:37,770 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:37,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:49:37,771 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash -852370264, now seen corresponding path program 1 times [2020-10-26 20:49:37,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:37,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020404491] [2020-10-26 20:49:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:37,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:40,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:40,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 20:49:40,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:40,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3014 [2020-10-26 20:49:40,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:40,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:40,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:40,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:49:40,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:41,108 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:41,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:41,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:41,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:41,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:41,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:41,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:49:41,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:41,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:41,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:41,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:41,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:41,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:41,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:41,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:41,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:41,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:41,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:41,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 20:49:41,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:41,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:41,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:41,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:49:41,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:41,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:41,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:41,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:41,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 20:49:41,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:41,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 20:49:41,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:41,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:41,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:41,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:49:41,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 20:49:41,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020404491] [2020-10-26 20:49:41,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:41,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:49:41,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697253850] [2020-10-26 20:49:41,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:41,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:41,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:41,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:41,628 INFO L87 Difference]: Start difference. First operand 14108 states and 19515 transitions. Second operand 7 states. [2020-10-26 20:49:41,896 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:43,886 INFO L93 Difference]: Finished difference Result 27998 states and 39037 transitions. [2020-10-26 20:49:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:49:43,887 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-10-26 20:49:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:44,037 INFO L225 Difference]: With dead ends: 27998 [2020-10-26 20:49:44,037 INFO L226 Difference]: Without dead ends: 14011 [2020-10-26 20:49:44,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14011 states. [2020-10-26 20:49:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14011 to 13963. [2020-10-26 20:49:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13963 states. [2020-10-26 20:49:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13963 states to 13963 states and 18590 transitions. [2020-10-26 20:49:44,411 INFO L78 Accepts]: Start accepts. Automaton has 13963 states and 18590 transitions. Word has length 203 [2020-10-26 20:49:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:44,411 INFO L481 AbstractCegarLoop]: Abstraction has 13963 states and 18590 transitions. [2020-10-26 20:49:44,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 13963 states and 18590 transitions. [2020-10-26 20:49:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-26 20:49:44,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:44,443 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:44,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:49:44,443 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1831243618, now seen corresponding path program 1 times [2020-10-26 20:49:44,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:44,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122567486] [2020-10-26 20:49:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:44,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:44,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:44,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:44,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:48,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:49,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:49,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:49,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-26 20:49:49,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:49:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 20:49:49,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:49:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:49,847 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:49,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:49,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:49,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:49,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:49,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:49,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:49:49,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:49,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:49,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:49,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:49,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:49,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:49,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:49,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:50,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:50,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:50,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:50,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:49:50,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:50,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:50,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:50,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:50,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:50,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:49:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:50,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:50,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:50,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:49:50,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:49:50,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:49:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:50,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 20:49:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:50,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:50,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:49:50,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:50,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:49:50,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-26 20:49:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:50,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:50,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:49:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:50,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:50,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:50,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:49:50,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:50,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:49:50,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:49:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:50,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 66 proven. 39 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 20:49:50,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122567486] [2020-10-26 20:49:50,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:50,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:49:50,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793284795] [2020-10-26 20:49:50,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:50,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:50,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:50,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:50,332 INFO L87 Difference]: Start difference. First operand 13963 states and 18590 transitions. Second operand 8 states. [2020-10-26 20:49:50,587 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:51,923 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:53,986 INFO L93 Difference]: Finished difference Result 35073 states and 48808 transitions. [2020-10-26 20:49:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:49:53,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 223 [2020-10-26 20:49:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:54,081 INFO L225 Difference]: With dead ends: 35073 [2020-10-26 20:49:54,081 INFO L226 Difference]: Without dead ends: 21231 [2020-10-26 20:49:54,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:49:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21231 states. [2020-10-26 20:49:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21231 to 21039. [2020-10-26 20:49:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21039 states. [2020-10-26 20:49:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21039 states to 21039 states and 27344 transitions. [2020-10-26 20:49:54,803 INFO L78 Accepts]: Start accepts. Automaton has 21039 states and 27344 transitions. Word has length 223 [2020-10-26 20:49:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:54,804 INFO L481 AbstractCegarLoop]: Abstraction has 21039 states and 27344 transitions. [2020-10-26 20:49:54,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:54,804 INFO L276 IsEmpty]: Start isEmpty. Operand 21039 states and 27344 transitions. [2020-10-26 20:49:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-26 20:49:54,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:54,850 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:49:54,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:49:54,851 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1395330052, now seen corresponding path program 1 times [2020-10-26 20:49:54,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:54,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411439734] [2020-10-26 20:49:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:55,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:55,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:57,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-26 20:49:58,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:58,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3055 [2020-10-26 20:49:58,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:58,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 20:49:58,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:49:58,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,355 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:58,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:58,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:58,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:49:58,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:58,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:58,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:49:58,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:58,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 20:49:58,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 20:49:58,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:49:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:49:58,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:58,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:49:58,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:58,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:58,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:49:58,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:49:58,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411439734] [2020-10-26 20:49:58,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:58,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:58,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927980123] [2020-10-26 20:49:58,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:58,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:58,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:58,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:58,797 INFO L87 Difference]: Start difference. First operand 21039 states and 27344 transitions. Second operand 7 states. [2020-10-26 20:49:59,186 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:59,652 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:04,328 INFO L93 Difference]: Finished difference Result 44431 states and 59701 transitions. [2020-10-26 20:50:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:50:04,329 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 277 [2020-10-26 20:50:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:04,428 INFO L225 Difference]: With dead ends: 44431 [2020-10-26 20:50:04,429 INFO L226 Difference]: Without dead ends: 23513 [2020-10-26 20:50:04,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:50:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23513 states. [2020-10-26 20:50:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23513 to 23002. [2020-10-26 20:50:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23002 states. [2020-10-26 20:50:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23002 states to 23002 states and 28557 transitions. [2020-10-26 20:50:05,332 INFO L78 Accepts]: Start accepts. Automaton has 23002 states and 28557 transitions. Word has length 277 [2020-10-26 20:50:05,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:05,333 INFO L481 AbstractCegarLoop]: Abstraction has 23002 states and 28557 transitions. [2020-10-26 20:50:05,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 23002 states and 28557 transitions. [2020-10-26 20:50:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-26 20:50:05,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:05,384 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:50:05,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:50:05,385 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1227608748, now seen corresponding path program 1 times [2020-10-26 20:50:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:05,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356983186] [2020-10-26 20:50:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:05,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:06,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:08,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:08,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-26 20:50:08,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:08,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2876 [2020-10-26 20:50:08,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:50:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 288 [2020-10-26 20:50:08,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:09,034 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:09,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:09,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:09,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:09,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:09,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:50:09,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:09,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:09,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:09,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:09,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:09,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:09,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:09,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:50:09,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:09,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-26 20:50:09,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:50:09,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:09,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:50:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:09,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:09,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:09,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 20:50:09,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 20:50:09,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:50:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:50:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 122 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:50:10,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356983186] [2020-10-26 20:50:10,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:10,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:50:10,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722966219] [2020-10-26 20:50:10,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:50:10,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:10,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:50:10,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:50:10,364 INFO L87 Difference]: Start difference. First operand 23002 states and 28557 transitions. Second operand 9 states. [2020-10-26 20:50:10,650 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:12,584 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 174 [2020-10-26 20:50:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:14,756 INFO L93 Difference]: Finished difference Result 41578 states and 51272 transitions. [2020-10-26 20:50:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:50:14,757 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 285 [2020-10-26 20:50:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:14,827 INFO L225 Difference]: With dead ends: 41578 [2020-10-26 20:50:14,827 INFO L226 Difference]: Without dead ends: 23400 [2020-10-26 20:50:14,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:50:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23400 states. [2020-10-26 20:50:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23400 to 23202. [2020-10-26 20:50:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23202 states. [2020-10-26 20:50:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23202 states to 23202 states and 28769 transitions. [2020-10-26 20:50:15,343 INFO L78 Accepts]: Start accepts. Automaton has 23202 states and 28769 transitions. Word has length 285 [2020-10-26 20:50:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:15,343 INFO L481 AbstractCegarLoop]: Abstraction has 23202 states and 28769 transitions. [2020-10-26 20:50:15,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:50:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 23202 states and 28769 transitions. [2020-10-26 20:50:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-26 20:50:15,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:15,376 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:50:15,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:50:15,377 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:15,377 INFO L82 PathProgramCache]: Analyzing trace with hash -561686259, now seen corresponding path program 1 times [2020-10-26 20:50:15,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:15,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887495322] [2020-10-26 20:50:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:15,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:15,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:15,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:19,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:19,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:20,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:20,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-26 20:50:20,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:50:20,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 20:50:20,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:50:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:20,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:50:20,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:20,807 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:20,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:20,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:20,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:20,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:20,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:20,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:50:20,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:20,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:20,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:20,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:20,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:20,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:20,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:21,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:21,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:21,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:50:21,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:21,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-26 20:50:21,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:21,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:21,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:21,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:50:21,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:21,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:50:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:21,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:21,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:21,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:50:21,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:21,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:50:21,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:21,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:21,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:21,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:50:21,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:21,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 20:50:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:21,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:21,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:21,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:50:21,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:21,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:50:21,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:21,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:21,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 20:50:21,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:21,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 140 proven. 27 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:50:21,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887495322] [2020-10-26 20:50:21,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:21,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:50:21,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334049326] [2020-10-26 20:50:21,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:50:21,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:50:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:50:21,734 INFO L87 Difference]: Start difference. First operand 23202 states and 28769 transitions. Second operand 8 states. [2020-10-26 20:50:22,019 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:25,722 INFO L93 Difference]: Finished difference Result 59797 states and 75970 transitions. [2020-10-26 20:50:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:50:25,722 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 293 [2020-10-26 20:50:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:25,842 INFO L225 Difference]: With dead ends: 59797 [2020-10-26 20:50:25,842 INFO L226 Difference]: Without dead ends: 41759 [2020-10-26 20:50:25,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:50:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41759 states. [2020-10-26 20:50:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41759 to 41056. [2020-10-26 20:50:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41056 states. [2020-10-26 20:50:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41056 states to 41056 states and 51007 transitions. [2020-10-26 20:50:27,104 INFO L78 Accepts]: Start accepts. Automaton has 41056 states and 51007 transitions. Word has length 293 [2020-10-26 20:50:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:27,105 INFO L481 AbstractCegarLoop]: Abstraction has 41056 states and 51007 transitions. [2020-10-26 20:50:27,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 41056 states and 51007 transitions. [2020-10-26 20:50:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-26 20:50:27,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:27,130 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 20:50:27,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:50:27,130 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:27,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2033890257, now seen corresponding path program 1 times [2020-10-26 20:50:27,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:27,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143276818] [2020-10-26 20:50:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:27,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:27,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:27,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:27,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:32,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:32,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:32,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-26 20:50:32,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:50:32,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-26 20:50:32,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:32,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 20:50:32,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:32,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-26 20:50:32,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:33,072 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-26 20:50:33,441 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-26 20:50:33,749 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 79 [2020-10-26 20:50:34,038 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2020-10-26 20:50:34,311 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-10-26 20:50:34,554 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-10-26 20:50:34,756 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-26 20:50:34,902 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-10-26 20:50:35,182 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:35,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:35,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:35,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:35,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:35,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:50:35,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:35,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:35,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:35,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:35,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:35,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:35,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:50:35,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:50:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:35,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:35,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:35,706 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-26 20:50:36,034 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-10-26 20:50:36,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:36,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:36,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:36,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 20:50:36,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:36,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-26 20:50:36,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:36,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:50:36,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:36,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-26 20:50:36,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:37,434 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-10-26 20:50:37,901 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 110 [2020-10-26 20:50:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 3 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:50:40,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143276818] [2020-10-26 20:50:40,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:40,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 20:50:40,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291295549] [2020-10-26 20:50:40,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:50:40,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:40,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:50:40,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:50:40,492 INFO L87 Difference]: Start difference. First operand 41056 states and 51007 transitions. Second operand 19 states. [2020-10-26 20:50:40,949 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-26 20:50:41,369 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2020-10-26 20:50:42,449 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 177 [2020-10-26 20:50:46,725 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 57 [2020-10-26 20:50:47,782 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 56 [2020-10-26 20:50:48,480 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2020-10-26 20:50:49,492 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 69 [2020-10-26 20:50:49,984 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 67 [2020-10-26 20:50:50,543 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 79 [2020-10-26 20:50:51,866 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 251 DAG size of output: 197 [2020-10-26 20:50:53,304 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 271 DAG size of output: 217 [2020-10-26 20:50:56,745 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 275 DAG size of output: 214 [2020-10-26 20:50:59,727 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 275 DAG size of output: 211 [2020-10-26 20:51:01,899 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 276 DAG size of output: 208 [2020-10-26 20:51:03,925 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 277 DAG size of output: 205 [2020-10-26 20:51:04,828 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 104 [2020-10-26 20:51:06,986 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 277 DAG size of output: 201 [2020-10-26 20:51:07,660 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 70 [2020-10-26 20:51:08,407 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 82 [2020-10-26 20:51:09,868 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 275 DAG size of output: 198 [2020-10-26 20:51:11,429 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 295 DAG size of output: 218 [2020-10-26 20:51:14,394 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 299 DAG size of output: 215 [2020-10-26 20:51:16,992 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 299 DAG size of output: 212 [2020-10-26 20:51:19,144 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 300 DAG size of output: 209 [2020-10-26 20:51:21,248 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 301 DAG size of output: 206 [2020-10-26 20:51:23,333 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 301 DAG size of output: 202 [2020-10-26 20:51:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:24,098 INFO L93 Difference]: Finished difference Result 83439 states and 103705 transitions. [2020-10-26 20:51:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 20:51:24,099 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 296 [2020-10-26 20:51:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:24,185 INFO L225 Difference]: With dead ends: 83439 [2020-10-26 20:51:24,185 INFO L226 Difference]: Without dead ends: 42520 [2020-10-26 20:51:24,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=483, Invalid=1497, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 20:51:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42520 states. [2020-10-26 20:51:24,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42520 to 41910. [2020-10-26 20:51:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41910 states. [2020-10-26 20:51:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41910 states to 41910 states and 52058 transitions. [2020-10-26 20:51:25,017 INFO L78 Accepts]: Start accepts. Automaton has 41910 states and 52058 transitions. Word has length 296 [2020-10-26 20:51:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:25,017 INFO L481 AbstractCegarLoop]: Abstraction has 41910 states and 52058 transitions. [2020-10-26 20:51:25,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 20:51:25,018 INFO L276 IsEmpty]: Start isEmpty. Operand 41910 states and 52058 transitions. [2020-10-26 20:51:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-26 20:51:25,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:25,052 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:51:25,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:51:25,052 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1997602721, now seen corresponding path program 1 times [2020-10-26 20:51:25,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:25,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38895926] [2020-10-26 20:51:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:25,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:25,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:26,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:27,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:30,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:30,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-26 20:51:30,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:51:30,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 20:51:30,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:30,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:51:30,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 20:51:30,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 20:51:30,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:30,475 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:30,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:30,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:30,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:30,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:30,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:30,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:51:30,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:30,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:30,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:30,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:30,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:30,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:30,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:30,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:30,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:51:30,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:30,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 20:51:30,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:30,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 20:51:30,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:30,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:51:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:30,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:30,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:30,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 20:51:30,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:51:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 20:51:30,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 20:51:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:30,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 20:51:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:30,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:31,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:31,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:51:31,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:31,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:51:31,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:31,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:31,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:31,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:51:31,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 185 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 20:51:31,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38895926] [2020-10-26 20:51:31,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:31,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:51:31,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437946262] [2020-10-26 20:51:31,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:51:31,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:31,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:51:31,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:51:31,164 INFO L87 Difference]: Start difference. First operand 41910 states and 52058 transitions. Second operand 8 states. [2020-10-26 20:51:31,809 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:51:34,212 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:51:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:38,840 INFO L93 Difference]: Finished difference Result 125189 states and 167966 transitions. [2020-10-26 20:51:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:51:38,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 308 [2020-10-26 20:51:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:39,151 INFO L225 Difference]: With dead ends: 125189 [2020-10-26 20:51:39,151 INFO L226 Difference]: Without dead ends: 84182 [2020-10-26 20:51:39,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:51:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84182 states.