/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:24:37,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:24:37,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:24:37,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:24:37,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:24:37,410 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:24:37,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:24:37,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:24:37,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:24:37,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:24:37,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:24:37,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:24:37,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:24:37,412 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:24:37,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:24:37,412 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:24:37,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:24:37,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:24:37,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:24:37,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:24:37,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:24:37,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:24:37,413 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:24:37,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:24:37,413 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:24:37,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:24:37,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:24:37,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:24:37,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:24:37,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:24:37,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:24:37,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:24:37,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:24:37,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:24:37,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:24:37,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:24:37,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:24:37,415 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:24:37,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:24:37,415 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:24:37,415 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:24:37,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:24:37,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:24:37,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:24:37,629 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:24:37,629 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:24:37,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2023-03-30 23:24:38,776 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:24:39,267 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:24:39,267 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2023-03-30 23:24:39,299 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecdc62ea9/5a9b462136a448b5aef9a40ac550d77d/FLAGd81614615 [2023-03-30 23:24:39,314 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecdc62ea9/5a9b462136a448b5aef9a40ac550d77d [2023-03-30 23:24:39,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:24:39,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:24:39,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:24:39,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:24:39,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:24:39,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:24:39" (1/1) ... [2023-03-30 23:24:39,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19131284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:39, skipping insertion in model container [2023-03-30 23:24:39,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:24:39" (1/1) ... [2023-03-30 23:24:39,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:24:39,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:24:39,720 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label27.c[6468,6481] [2023-03-30 23:24:40,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:24:40,508 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:24:40,539 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label27.c[6468,6481] [2023-03-30 23:24:41,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:24:41,056 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:24:41,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41 WrapperNode [2023-03-30 23:24:41,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:24:41,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:24:41,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:24:41,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:24:41,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (1/1) ... [2023-03-30 23:24:41,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (1/1) ... [2023-03-30 23:24:41,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (1/1) ... [2023-03-30 23:24:41,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (1/1) ... [2023-03-30 23:24:41,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (1/1) ... [2023-03-30 23:24:41,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (1/1) ... [2023-03-30 23:24:41,365 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (1/1) ... [2023-03-30 23:24:41,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (1/1) ... [2023-03-30 23:24:41,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:24:41,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:24:41,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:24:41,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:24:41,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (1/1) ... [2023-03-30 23:24:41,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:24:41,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:41,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:24:41,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:24:41,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:24:41,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:24:41,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:24:41,498 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:24:41,498 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:24:41,498 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:24:41,498 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:24:41,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:24:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:24:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:24:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:24:41,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:24:41,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:24:41,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:24:41,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:24:41,560 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:24:41,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:24:46,381 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:24:46,400 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:24:46,401 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:24:46,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:24:46 BoogieIcfgContainer [2023-03-30 23:24:46,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:24:46,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:24:46,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:24:46,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:24:46,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:24:39" (1/3) ... [2023-03-30 23:24:46,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e972813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:24:46, skipping insertion in model container [2023-03-30 23:24:46,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:24:41" (2/3) ... [2023-03-30 23:24:46,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e972813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:24:46, skipping insertion in model container [2023-03-30 23:24:46,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:24:46" (3/3) ... [2023-03-30 23:24:46,415 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label27.c [2023-03-30 23:24:46,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:24:46,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:24:46,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:24:46,510 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@16b99ba4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:24:46,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:24:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 23:24:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-30 23:24:46,528 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:46,529 INFO L195 NwaCegarLoop]: 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] [2023-03-30 23:24:46,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:46,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:46,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1187688724, now seen corresponding path program 1 times [2023-03-30 23:24:46,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:46,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130321213] [2023-03-30 23:24:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:46,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:47,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:47,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:47,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130321213] [2023-03-30 23:24:47,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130321213] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:47,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:47,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:24:47,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548768200] [2023-03-30 23:24:47,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:47,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:24:47,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:47,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:24:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:24:47,198 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:24:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:53,432 INFO L93 Difference]: Finished difference Result 3165 states and 5795 transitions. [2023-03-30 23:24:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:24:53,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-03-30 23:24:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:53,457 INFO L225 Difference]: With dead ends: 3165 [2023-03-30 23:24:53,458 INFO L226 Difference]: Without dead ends: 1961 [2023-03-30 23:24:53,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:24:53,474 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 2897 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4376 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2897 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 4995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 4376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:53,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2897 Valid, 292 Invalid, 4995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 4376 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-03-30 23:24:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-03-30 23:24:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1943. [2023-03-30 23:24:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1918 states have (on average 1.7278415015641293) internal successors, (3314), 1920 states have internal predecessors, (3314), 10 states have call successors, (10), 10 states have call predecessors, (10), 14 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) [2023-03-30 23:24:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3346 transitions. [2023-03-30 23:24:53,599 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3346 transitions. Word has length 51 [2023-03-30 23:24:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:53,600 INFO L495 AbstractCegarLoop]: Abstraction has 1943 states and 3346 transitions. [2023-03-30 23:24:53,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:24:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3346 transitions. [2023-03-30 23:24:53,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-03-30 23:24:53,604 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:53,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:53,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:24:53,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:53,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1874603787, now seen corresponding path program 1 times [2023-03-30 23:24:53,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:53,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864088647] [2023-03-30 23:24:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:53,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:53,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:53,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:53,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864088647] [2023-03-30 23:24:53,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864088647] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:53,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:24:53,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:24:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566057384] [2023-03-30 23:24:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:24:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:24:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:24:53,954 INFO L87 Difference]: Start difference. First operand 1943 states and 3346 transitions. Second operand has 8 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:25:01,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:01,644 INFO L93 Difference]: Finished difference Result 6452 states and 11418 transitions. [2023-03-30 23:25:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:25:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 120 [2023-03-30 23:25:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:01,671 INFO L225 Difference]: With dead ends: 6452 [2023-03-30 23:25:01,672 INFO L226 Difference]: Without dead ends: 4515 [2023-03-30 23:25:01,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:25:01,687 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 6901 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 6734 mSolverCounterSat, 2197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6901 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 8931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2197 IncrementalHoareTripleChecker+Valid, 6734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:01,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6901 Valid, 596 Invalid, 8931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2197 Valid, 6734 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-03-30 23:25:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4515 states. [2023-03-30 23:25:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4515 to 4476. [2023-03-30 23:25:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4388 states have (on average 1.5009115770282588) internal successors, (6586), 4401 states have internal predecessors, (6586), 22 states have call successors, (22), 22 states have call predecessors, (22), 65 states have return successors, (161), 52 states have call predecessors, (161), 21 states have call successors, (161) [2023-03-30 23:25:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 6769 transitions. [2023-03-30 23:25:01,858 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 6769 transitions. Word has length 120 [2023-03-30 23:25:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:01,859 INFO L495 AbstractCegarLoop]: Abstraction has 4476 states and 6769 transitions. [2023-03-30 23:25:01,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:25:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 6769 transitions. [2023-03-30 23:25:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-30 23:25:01,867 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:01,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:25:01,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:25:01,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:01,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash -334956775, now seen corresponding path program 1 times [2023-03-30 23:25:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:01,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55611506] [2023-03-30 23:25:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:02,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:02,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:02,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55611506] [2023-03-30 23:25:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55611506] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:02,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:25:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:25:02,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376240033] [2023-03-30 23:25:02,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:02,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:25:02,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:02,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:25:02,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:25:02,239 INFO L87 Difference]: Start difference. First operand 4476 states and 6769 transitions. Second operand has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:25:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:08,631 INFO L93 Difference]: Finished difference Result 13390 states and 20653 transitions. [2023-03-30 23:25:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:25:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 122 [2023-03-30 23:25:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:08,674 INFO L225 Difference]: With dead ends: 13390 [2023-03-30 23:25:08,674 INFO L226 Difference]: Without dead ends: 8920 [2023-03-30 23:25:08,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:25:08,688 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5086 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 6567 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5086 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 7541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 6567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:08,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5086 Valid, 814 Invalid, 7541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 6567 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-03-30 23:25:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8920 states. [2023-03-30 23:25:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8920 to 8799. [2023-03-30 23:25:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8567 states have (on average 1.345862028714836) internal successors, (11530), 8609 states have internal predecessors, (11530), 42 states have call successors, (42), 42 states have call predecessors, (42), 189 states have return successors, (627), 147 states have call predecessors, (627), 41 states have call successors, (627) [2023-03-30 23:25:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 12199 transitions. [2023-03-30 23:25:08,907 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 12199 transitions. Word has length 122 [2023-03-30 23:25:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:08,909 INFO L495 AbstractCegarLoop]: Abstraction has 8799 states and 12199 transitions. [2023-03-30 23:25:08,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:25:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 12199 transitions. [2023-03-30 23:25:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-03-30 23:25:08,912 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:08,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:25:08,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:25:08,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:08,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1718388719, now seen corresponding path program 1 times [2023-03-30 23:25:08,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:08,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263946132] [2023-03-30 23:25:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:08,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:09,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:09,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263946132] [2023-03-30 23:25:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263946132] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168707109] [2023-03-30 23:25:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:09,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:09,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:09,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:25:09,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:25:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:09,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:25:09,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:09,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:25:09,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168707109] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:09,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:25:09,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:25:09,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155268498] [2023-03-30 23:25:09,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:09,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:25:09,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:25:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:25:09,537 INFO L87 Difference]: Start difference. First operand 8799 states and 12199 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:25:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:12,819 INFO L93 Difference]: Finished difference Result 25892 states and 37035 transitions. [2023-03-30 23:25:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:25:12,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 166 [2023-03-30 23:25:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:12,959 INFO L225 Difference]: With dead ends: 25892 [2023-03-30 23:25:12,959 INFO L226 Difference]: Without dead ends: 17099 [2023-03-30 23:25:12,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:25:12,984 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 843 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:12,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 1150 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-30 23:25:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17099 states. [2023-03-30 23:25:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17099 to 17071. [2023-03-30 23:25:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17071 states, 16671 states have (on average 1.2196029032451563) internal successors, (20332), 16742 states have internal predecessors, (20332), 82 states have call successors, (82), 82 states have call predecessors, (82), 317 states have return successors, (1633), 246 states have call predecessors, (1633), 81 states have call successors, (1633) [2023-03-30 23:25:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 22047 transitions. [2023-03-30 23:25:13,339 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 22047 transitions. Word has length 166 [2023-03-30 23:25:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:13,339 INFO L495 AbstractCegarLoop]: Abstraction has 17071 states and 22047 transitions. [2023-03-30 23:25:13,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:25:13,340 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 22047 transitions. [2023-03-30 23:25:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-03-30 23:25:13,341 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:13,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:25:13,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 23:25:13,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:13,548 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:13,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash -967684053, now seen corresponding path program 1 times [2023-03-30 23:25:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:13,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383859392] [2023-03-30 23:25:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:13,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:13,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:13,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:13,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383859392] [2023-03-30 23:25:13,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383859392] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:13,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668893322] [2023-03-30 23:25:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:13,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:13,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:13,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:25:13,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:25:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:13,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:25:13,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:14,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:25:14,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668893322] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:14,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:25:14,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:25:14,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671925530] [2023-03-30 23:25:14,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:14,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:25:14,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:14,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:25:14,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:25:14,021 INFO L87 Difference]: Start difference. First operand 17071 states and 22047 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:25:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:17,152 INFO L93 Difference]: Finished difference Result 33334 states and 43327 transitions. [2023-03-30 23:25:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:25:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 171 [2023-03-30 23:25:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:17,205 INFO L225 Difference]: With dead ends: 33334 [2023-03-30 23:25:17,205 INFO L226 Difference]: Without dead ends: 17072 [2023-03-30 23:25:17,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:25:17,239 INFO L413 NwaCegarLoop]: 1412 mSDtfsCounter, 1182 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:17,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 1518 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-30 23:25:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17072 states. [2023-03-30 23:25:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17072 to 15465. [2023-03-30 23:25:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15465 states, 15081 states have (on average 1.161925601750547) internal successors, (17523), 15152 states have internal predecessors, (17523), 74 states have call successors, (74), 74 states have call predecessors, (74), 309 states have return successors, (1141), 238 states have call predecessors, (1141), 73 states have call successors, (1141) [2023-03-30 23:25:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15465 states to 15465 states and 18738 transitions. [2023-03-30 23:25:17,542 INFO L78 Accepts]: Start accepts. Automaton has 15465 states and 18738 transitions. Word has length 171 [2023-03-30 23:25:17,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:17,543 INFO L495 AbstractCegarLoop]: Abstraction has 15465 states and 18738 transitions. [2023-03-30 23:25:17,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:25:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 15465 states and 18738 transitions. [2023-03-30 23:25:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-03-30 23:25:17,547 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:17,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2023-03-30 23:25:17,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:25:17,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:17,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:17,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash -582467522, now seen corresponding path program 1 times [2023-03-30 23:25:17,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:17,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785337733] [2023-03-30 23:25:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:17,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:18,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:18,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-30 23:25:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:25:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785337733] [2023-03-30 23:25:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785337733] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665456910] [2023-03-30 23:25:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:18,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:18,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:18,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:25:18,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:25:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:18,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:25:18,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:18,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:25:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:25:18,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665456910] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:25:18,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:25:18,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:25:18,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376018020] [2023-03-30 23:25:18,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:25:18,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:25:18,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:25:18,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:25:18,746 INFO L87 Difference]: Start difference. First operand 15465 states and 18738 transitions. Second operand has 11 states, 11 states have (on average 33.36363636363637) internal successors, (367), 9 states have internal predecessors, (367), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:25:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:25:25,377 INFO L93 Difference]: Finished difference Result 44659 states and 56721 transitions. [2023-03-30 23:25:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 23:25:25,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 33.36363636363637) internal successors, (367), 9 states have internal predecessors, (367), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 240 [2023-03-30 23:25:25,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:25:25,470 INFO L225 Difference]: With dead ends: 44659 [2023-03-30 23:25:25,470 INFO L226 Difference]: Without dead ends: 30003 [2023-03-30 23:25:25,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 481 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:25:25,503 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 9082 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 6862 mSolverCounterSat, 1398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9082 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 8260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1398 IncrementalHoareTripleChecker+Valid, 6862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:25:25,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9082 Valid, 651 Invalid, 8260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1398 Valid, 6862 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-03-30 23:25:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30003 states. [2023-03-30 23:25:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30003 to 29748. [2023-03-30 23:25:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29748 states, 28733 states have (on average 1.1312776250304528) internal successors, (32505), 28992 states have internal predecessors, (32505), 138 states have call successors, (138), 138 states have call predecessors, (138), 876 states have return successors, (3375), 617 states have call predecessors, (3375), 137 states have call successors, (3375) [2023-03-30 23:25:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29748 states to 29748 states and 36018 transitions. [2023-03-30 23:25:26,165 INFO L78 Accepts]: Start accepts. Automaton has 29748 states and 36018 transitions. Word has length 240 [2023-03-30 23:25:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:25:26,166 INFO L495 AbstractCegarLoop]: Abstraction has 29748 states and 36018 transitions. [2023-03-30 23:25:26,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 33.36363636363637) internal successors, (367), 9 states have internal predecessors, (367), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:25:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 29748 states and 36018 transitions. [2023-03-30 23:25:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-03-30 23:25:26,172 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:25:26,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:25:26,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:25:26,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:26,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:25:26,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:25:26,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1406445957, now seen corresponding path program 1 times [2023-03-30 23:25:26,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:25:26,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595136379] [2023-03-30 23:25:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:26,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:25:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:26,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:25:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:26,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:25:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:26,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-03-30 23:25:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:25:26,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:25:26,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595136379] [2023-03-30 23:25:26,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595136379] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:25:26,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179041341] [2023-03-30 23:25:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:25:26,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:25:26,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:25:26,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:25:26,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:25:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:25:26,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:25:26,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:25:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-03-30 23:25:27,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:25:27,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179041341] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:25:27,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:25:27,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 23:25:27,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502531569] [2023-03-30 23:25:27,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:25:27,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:25:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:25:27,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:25:27,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:25:27,033 INFO L87 Difference]: Start difference. First operand 29748 states and 36018 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)