/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/psyco/psyco_net_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 22:26:12,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 22:26:12,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 22:26:12,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 22:26:12,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 22:26:12,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 22:26:12,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 22:26:12,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 22:26:12,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 22:26:12,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 22:26:12,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 22:26:12,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 22:26:12,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 22:26:12,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 22:26:12,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 22:26:12,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 22:26:12,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 22:26:12,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 22:26:12,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 22:26:12,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 22:26:12,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 22:26:12,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 22:26:12,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 22:26:12,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 22:26:12,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 22:26:12,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 22:26:12,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 22:26:12,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 22:26:12,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 22:26:12,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 22:26:12,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 22:26:12,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 22:26:12,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 22:26:12,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 22:26:12,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 22:26:12,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 22:26:12,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 22:26:12,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 22:26:12,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 22:26:12,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 22:26:12,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 22:26:12,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 22:26:12,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 22:26:12,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 22:26:12,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 22:26:12,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 22:26:12,421 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 22:26:12,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 22:26:12,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 22:26:12,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 22:26:12,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 22:26:12,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 22:26:12,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 22:26:12,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 22:26:12,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 22:26:12,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 22:26:12,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 22:26:12,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 22:26:12,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 22:26:12,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 22:26:12,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 22:26:12,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 22:26:12,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 22:26:12,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:26:12,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 22:26:12,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 22:26:12,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 22:26:12,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 22:26:12,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 22:26:12,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 22:26:12,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 22:26:12,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 22:26:12,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 22:26:12,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 22:26:12,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 22:26:12,960 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 22:26:12,961 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 22:26:12,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_net_1.c [2020-10-27 22:26:13,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21de95c31/f9353e4874c34550a6c4dfca0cc297a8/FLAG168ec4b68 [2020-10-27 22:26:14,988 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 22:26:14,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_net_1.c [2020-10-27 22:26:15,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21de95c31/f9353e4874c34550a6c4dfca0cc297a8/FLAG168ec4b68 [2020-10-27 22:26:15,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21de95c31/f9353e4874c34550a6c4dfca0cc297a8 [2020-10-27 22:26:15,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 22:26:15,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 22:26:15,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 22:26:15,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 22:26:15,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 22:26:15,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:26:15" (1/1) ... [2020-10-27 22:26:15,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d0eba46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:15, skipping insertion in model container [2020-10-27 22:26:15,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:26:15" (1/1) ... [2020-10-27 22:26:15,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 22:26:16,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 22:26:17,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:26:17,991 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 22:26:19,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:26:19,500 INFO L208 MainTranslator]: Completed translation [2020-10-27 22:26:19,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19 WrapperNode [2020-10-27 22:26:19,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 22:26:19,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 22:26:19,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 22:26:19,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 22:26:19,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19" (1/1) ... [2020-10-27 22:26:19,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19" (1/1) ... [2020-10-27 22:26:19,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19" (1/1) ... [2020-10-27 22:26:19,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19" (1/1) ... [2020-10-27 22:26:20,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19" (1/1) ... [2020-10-27 22:26:20,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19" (1/1) ... [2020-10-27 22:26:20,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19" (1/1) ... [2020-10-27 22:26:20,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 22:26:20,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 22:26:20,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 22:26:20,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 22:26:20,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:26:21,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 22:26:21,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 22:26:21,123 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 22:26:21,124 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 22:26:21,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 22:26:21,124 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 22:26:21,124 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 22:26:21,124 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 22:26:21,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 22:26:21,125 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 22:26:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 22:26:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 22:26:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 22:26:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 22:26:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 22:26:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 22:26:40,968 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 22:26:40,968 INFO L298 CfgBuilder]: Removed 1130 assume(true) statements. [2020-10-27 22:26:40,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:26:40 BoogieIcfgContainer [2020-10-27 22:26:40,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 22:26:40,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 22:26:40,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 22:26:40,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 22:26:40,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 10:26:15" (1/3) ... [2020-10-27 22:26:40,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453f7bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:26:40, skipping insertion in model container [2020-10-27 22:26:40,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:26:19" (2/3) ... [2020-10-27 22:26:40,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453f7bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:26:40, skipping insertion in model container [2020-10-27 22:26:40,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:26:40" (3/3) ... [2020-10-27 22:26:40,992 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2020-10-27 22:26:41,003 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 22:26:41,014 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 22:26:41,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 22:26:41,098 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 22:26:41,098 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 22:26:41,098 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 22:26:41,098 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 22:26:41,098 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 22:26:41,098 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 22:26:41,099 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 22:26:41,099 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 22:26:41,228 INFO L276 IsEmpty]: Start isEmpty. Operand 9220 states. [2020-10-27 22:26:41,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 22:26:41,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:41,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:41,235 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -782733704, now seen corresponding path program 1 times [2020-10-27 22:26:41,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:41,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821655754] [2020-10-27 22:26:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:41,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:41,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:41,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 22:26:41,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:41,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 22:26:41,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 22:26:41,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:41,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 22:26:42,206 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 22:26:42,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:42,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:42,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:42,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:42,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:42,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 22:26:42,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:42,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:42,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:42,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:42,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:26:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:26:42,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821655754] [2020-10-27 22:26:42,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:26:42,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 22:26:42,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385604950] [2020-10-27 22:26:42,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 22:26:42,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 22:26:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 22:26:42,307 INFO L87 Difference]: Start difference. First operand 9220 states. Second operand 3 states. [2020-10-27 22:26:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:26:42,987 INFO L93 Difference]: Finished difference Result 17709 states and 35392 transitions. [2020-10-27 22:26:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 22:26:42,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-27 22:26:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:26:43,053 INFO L225 Difference]: With dead ends: 17709 [2020-10-27 22:26:43,053 INFO L226 Difference]: Without dead ends: 8285 [2020-10-27 22:26:43,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 22:26:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8285 states. [2020-10-27 22:26:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8285 to 8285. [2020-10-27 22:26:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8285 states. [2020-10-27 22:26:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8285 states to 8285 states and 13002 transitions. [2020-10-27 22:26:43,419 INFO L78 Accepts]: Start accepts. Automaton has 8285 states and 13002 transitions. Word has length 14 [2020-10-27 22:26:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:26:43,420 INFO L481 AbstractCegarLoop]: Abstraction has 8285 states and 13002 transitions. [2020-10-27 22:26:43,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 22:26:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 8285 states and 13002 transitions. [2020-10-27 22:26:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 22:26:43,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:26:43,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:26:43,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 22:26:43,424 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:26:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:26:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash 788089820, now seen corresponding path program 1 times [2020-10-27 22:26:43,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:26:43,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416302711] [2020-10-27 22:26:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:26:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:43,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:43,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:43,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 22:26:43,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:26:43,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-27 22:26:43,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:43,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:26:43,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 22:26:43,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 22:26:43,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:26:44,094 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 22:26:44,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:26:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:26:44,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:26:44,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:26:44,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:26:44,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:26:44,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 22:26:44,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:26:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:26:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:26:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:26:44,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 22:26:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:26:44,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416302711] [2020-10-27 22:26:44,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:26:44,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:26:44,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052344015] [2020-10-27 22:26:44,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:26:44,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:26:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:26:44,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:26:44,177 INFO L87 Difference]: Start difference. First operand 8285 states and 13002 transitions. Second operand 4 states. [2020-10-27 22:26:44,626 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 22:27:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:27:35,642 INFO L93 Difference]: Finished difference Result 16567 states and 26002 transitions. [2020-10-27 22:27:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:27:35,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 22:27:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:27:35,697 INFO L225 Difference]: With dead ends: 16567 [2020-10-27 22:27:35,697 INFO L226 Difference]: Without dead ends: 8288 [2020-10-27 22:27:35,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:27:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2020-10-27 22:27:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 8288. [2020-10-27 22:27:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8288 states. [2020-10-27 22:27:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13005 transitions. [2020-10-27 22:27:35,940 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13005 transitions. Word has length 15 [2020-10-27 22:27:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:27:35,940 INFO L481 AbstractCegarLoop]: Abstraction has 8288 states and 13005 transitions. [2020-10-27 22:27:35,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:27:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13005 transitions. [2020-10-27 22:27:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 22:27:35,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:27:35,942 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:27:35,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 22:27:35,943 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:27:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:27:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1563134581, now seen corresponding path program 1 times [2020-10-27 22:27:35,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:27:35,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864853564] [2020-10-27 22:27:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:27:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:36,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:36,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:36,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 22:27:36,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:36,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-27 22:27:36,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:36,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:27:36,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 22:27:36,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 22:27:36,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:36,446 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 22:27:36,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:27:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:36,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:36,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:36,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:27:36,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:36,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 22:27:36,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:36,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:27:36,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:27:36,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:27:36,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:27:36,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864853564] [2020-10-27 22:27:36,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:27:36,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:27:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379531070] [2020-10-27 22:27:36,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:27:36,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:27:36,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:27:36,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:27:36,517 INFO L87 Difference]: Start difference. First operand 8288 states and 13005 transitions. Second operand 4 states. [2020-10-27 22:27:36,822 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 22:27:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:27:43,185 INFO L93 Difference]: Finished difference Result 16462 states and 25851 transitions. [2020-10-27 22:27:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:27:43,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 22:27:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:27:43,232 INFO L225 Difference]: With dead ends: 16462 [2020-10-27 22:27:43,232 INFO L226 Difference]: Without dead ends: 8181 [2020-10-27 22:27:43,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:27:43,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8181 states. [2020-10-27 22:27:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8181 to 8181. [2020-10-27 22:27:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8181 states. [2020-10-27 22:27:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 12851 transitions. [2020-10-27 22:27:43,444 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 12851 transitions. Word has length 20 [2020-10-27 22:27:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:27:43,445 INFO L481 AbstractCegarLoop]: Abstraction has 8181 states and 12851 transitions. [2020-10-27 22:27:43,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:27:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 12851 transitions. [2020-10-27 22:27:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 22:27:43,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:27:43,451 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:27:43,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 22:27:43,451 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:27:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:27:43,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1307147288, now seen corresponding path program 1 times [2020-10-27 22:27:43,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:27:43,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955736110] [2020-10-27 22:27:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:27:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:43,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:43,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:43,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 22:27:43,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:43,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 22:27:43,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:27:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 22:27:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 22:27:43,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:44,009 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 22:27:44,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:27:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:44,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:44,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:44,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:27:44,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:44,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 22:27:44,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:44,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:27:44,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:27:44,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:27:44,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:27:44,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955736110] [2020-10-27 22:27:44,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:27:44,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:27:44,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697071289] [2020-10-27 22:27:44,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:27:44,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:27:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:27:44,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:27:44,049 INFO L87 Difference]: Start difference. First operand 8181 states and 12851 transitions. Second operand 4 states. [2020-10-27 22:27:44,305 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 22:27:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:27:58,418 INFO L93 Difference]: Finished difference Result 16270 states and 25569 transitions. [2020-10-27 22:27:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:27:58,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 22:27:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:27:58,457 INFO L225 Difference]: With dead ends: 16270 [2020-10-27 22:27:58,457 INFO L226 Difference]: Without dead ends: 8061 [2020-10-27 22:27:58,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:27:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2020-10-27 22:27:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 8061. [2020-10-27 22:27:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8061 states. [2020-10-27 22:27:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8061 states to 8061 states and 12231 transitions. [2020-10-27 22:27:58,653 INFO L78 Accepts]: Start accepts. Automaton has 8061 states and 12231 transitions. Word has length 24 [2020-10-27 22:27:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:27:58,653 INFO L481 AbstractCegarLoop]: Abstraction has 8061 states and 12231 transitions. [2020-10-27 22:27:58,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:27:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 8061 states and 12231 transitions. [2020-10-27 22:27:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 22:27:58,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:27:58,655 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:27:58,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 22:27:58,655 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:27:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:27:58,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1836183002, now seen corresponding path program 1 times [2020-10-27 22:27:58,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:27:58,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080503286] [2020-10-27 22:27:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:27:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:58,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:58,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:58,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 22:27:58,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:27:58,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-27 22:27:58,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:27:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 22:27:58,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:27:58,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:59,290 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 22:27:59,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:27:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:27:59,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:27:59,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:27:59,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:27:59,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:27:59,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 22:27:59,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:27:59,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:27:59,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:27:59,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:27:59,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:27:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:27:59,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080503286] [2020-10-27 22:27:59,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:27:59,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:27:59,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916629737] [2020-10-27 22:27:59,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:27:59,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:27:59,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:27:59,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:27:59,329 INFO L87 Difference]: Start difference. First operand 8061 states and 12231 transitions. Second operand 4 states. [2020-10-27 22:27:59,680 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 22:28:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:28:46,173 INFO L93 Difference]: Finished difference Result 16155 states and 24534 transitions. [2020-10-27 22:28:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:28:46,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 22:28:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:28:46,198 INFO L225 Difference]: With dead ends: 16155 [2020-10-27 22:28:46,199 INFO L226 Difference]: Without dead ends: 8106 [2020-10-27 22:28:46,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:28:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8106 states. [2020-10-27 22:28:46,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8106 to 8105. [2020-10-27 22:28:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8105 states. [2020-10-27 22:28:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8105 states to 8105 states and 12276 transitions. [2020-10-27 22:28:46,358 INFO L78 Accepts]: Start accepts. Automaton has 8105 states and 12276 transitions. Word has length 27 [2020-10-27 22:28:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:28:46,359 INFO L481 AbstractCegarLoop]: Abstraction has 8105 states and 12276 transitions. [2020-10-27 22:28:46,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:28:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 8105 states and 12276 transitions. [2020-10-27 22:28:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 22:28:46,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:28:46,362 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:28:46,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 22:28:46,362 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:28:46,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:28:46,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1055385208, now seen corresponding path program 1 times [2020-10-27 22:28:46,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:28:46,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595973539] [2020-10-27 22:28:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:28:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:46,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:46,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 22:28:46,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:46,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-27 22:28:46,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:46,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:28:46,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 22:28:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 22:28:46,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:46,877 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 22:28:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:28:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:28:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:28:46,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:28:46,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:28:46,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:28:46,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 22:28:46,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:28:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:28:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:28:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:28:46,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:28:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:28:46,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595973539] [2020-10-27 22:28:46,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:28:46,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:28:46,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977183527] [2020-10-27 22:28:46,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:28:46,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:28:46,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:28:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:28:46,921 INFO L87 Difference]: Start difference. First operand 8105 states and 12276 transitions. Second operand 4 states. [2020-10-27 22:28:47,186 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 22:29:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:29:42,996 INFO L93 Difference]: Finished difference Result 24289 states and 36801 transitions. [2020-10-27 22:29:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:29:42,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 22:29:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:29:43,048 INFO L225 Difference]: With dead ends: 24289 [2020-10-27 22:29:43,049 INFO L226 Difference]: Without dead ends: 16148 [2020-10-27 22:29:43,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:29:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16148 states. [2020-10-27 22:29:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16148 to 14891. [2020-10-27 22:29:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14891 states. [2020-10-27 22:29:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14891 states to 14891 states and 23129 transitions. [2020-10-27 22:29:43,361 INFO L78 Accepts]: Start accepts. Automaton has 14891 states and 23129 transitions. Word has length 28 [2020-10-27 22:29:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:29:43,362 INFO L481 AbstractCegarLoop]: Abstraction has 14891 states and 23129 transitions. [2020-10-27 22:29:43,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:29:43,362 INFO L276 IsEmpty]: Start isEmpty. Operand 14891 states and 23129 transitions. [2020-10-27 22:29:43,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 22:29:43,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:29:43,363 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:29:43,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 22:29:43,364 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:29:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:29:43,364 INFO L82 PathProgramCache]: Analyzing trace with hash 779196631, now seen corresponding path program 1 times [2020-10-27 22:29:43,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:29:43,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67908951] [2020-10-27 22:29:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:29:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:29:43,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:29:43,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:29:43,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 22:29:43,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:29:43,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 22:29:43,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:29:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:29:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 22:29:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 22:29:43,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:29:43,919 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 22:29:43,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:29:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:29:43,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:29:43,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:29:43,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:29:43,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:29:43,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 22:29:43,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:29:43,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:29:43,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:29:43,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:29:43,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:29:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 22:29:43,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67908951] [2020-10-27 22:29:43,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:29:43,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:29:43,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473241989] [2020-10-27 22:29:43,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:29:43,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:29:43,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:29:43,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:29:43,958 INFO L87 Difference]: Start difference. First operand 14891 states and 23129 transitions. Second operand 4 states. [2020-10-27 22:29:44,222 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 204