/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/Problem17_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:42:36,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:42:36,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:42:36,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:42:36,173 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 23:42:36,184 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:42:36,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:42:36,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:42:36,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:42:36,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:42:36,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:42:36,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:42:36,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:42:36,186 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:42:36,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:42:36,186 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:42:36,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:42:36,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:42:36,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:42:36,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:42:36,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:42:36,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:42:36,187 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:42:36,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:42:36,187 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:42:36,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:42:36,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:42:36,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:42:36,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:42:36,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:42:36,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:42:36,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:42:36,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:42:36,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:42:36,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:42:36,188 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:42:36,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:42:36,188 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:42:36,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:42:36,189 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:42:36,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:42:36,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:42:36,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:42:36,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:42:36,334 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:42:36,334 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:42:36,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label55.c [2023-03-30 23:42:37,140 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:42:37,508 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:42:37,508 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label55.c [2023-03-30 23:42:37,522 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22119faff/9a1530b3065c4873a1ee0f36853ace4d/FLAGb7063ce32 [2023-03-30 23:42:37,786 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22119faff/9a1530b3065c4873a1ee0f36853ace4d [2023-03-30 23:42:37,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:42:37,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:42:37,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:42:37,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:42:37,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:42:37,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:42:37" (1/1) ... [2023-03-30 23:42:37,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58bdef6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:37, skipping insertion in model container [2023-03-30 23:42:37,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:42:37" (1/1) ... [2023-03-30 23:42:37,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:42:37,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:42:37,976 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/Problem17_label55.c[1783,1796] [2023-03-30 23:42:38,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:42:38,381 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:42:38,396 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/Problem17_label55.c[1783,1796] [2023-03-30 23:42:38,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:42:38,587 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:42:38,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38 WrapperNode [2023-03-30 23:42:38,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:42:38,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:42:38,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:42:38,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:42:38,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (1/1) ... [2023-03-30 23:42:38,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (1/1) ... [2023-03-30 23:42:38,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (1/1) ... [2023-03-30 23:42:38,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (1/1) ... [2023-03-30 23:42:38,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (1/1) ... [2023-03-30 23:42:38,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (1/1) ... [2023-03-30 23:42:38,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (1/1) ... [2023-03-30 23:42:38,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (1/1) ... [2023-03-30 23:42:38,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:42:38,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:42:38,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:42:38,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:42:38,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (1/1) ... [2023-03-30 23:42:38,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:42:38,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:42:38,820 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 23:42:38,826 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 23:42:38,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:42:38,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:42:38,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:42:38,849 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:42:38,849 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:42:38,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:42:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:42:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:42:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:42:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:42:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:42:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:42:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:42:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:42:38,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:42:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:42:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:42:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:42:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:42:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:42:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:42:38,903 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:42:38,904 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:42:41,204 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:42:41,216 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:42:41,216 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:42:41,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:42:41 BoogieIcfgContainer [2023-03-30 23:42:41,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:42:41,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:42:41,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:42:41,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:42:41,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:42:37" (1/3) ... [2023-03-30 23:42:41,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a71ca2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:42:41, skipping insertion in model container [2023-03-30 23:42:41,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:42:38" (2/3) ... [2023-03-30 23:42:41,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a71ca2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:42:41, skipping insertion in model container [2023-03-30 23:42:41,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:42:41" (3/3) ... [2023-03-30 23:42:41,226 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label55.c [2023-03-30 23:42:41,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:42:41,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:42:41,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:42:41,288 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;@1e761cc7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:42:41,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:42:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 23:42:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-30 23:42:41,297 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:42:41,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:42:41,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:42:41,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:42:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1080562106, now seen corresponding path program 1 times [2023-03-30 23:42:41,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:42:41,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967781018] [2023-03-30 23:42:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:41,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:42:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:41,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:42:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:41,512 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 23:42:41,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:42:41,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967781018] [2023-03-30 23:42:41,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967781018] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:42:41,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:42:41,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:42:41,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818800432] [2023-03-30 23:42:41,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:42:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:42:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:42:41,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:42:41,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:42:41,534 INFO L87 Difference]: Start difference. First operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 23:42:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:42:44,578 INFO L93 Difference]: Finished difference Result 1692 states and 3091 transitions. [2023-03-30 23:42:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:42:44,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2023-03-30 23:42:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:42:44,594 INFO L225 Difference]: With dead ends: 1692 [2023-03-30 23:42:44,594 INFO L226 Difference]: Without dead ends: 1012 [2023-03-30 23:42:44,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:42:44,605 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1487 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:42:44,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 135 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:42:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-03-30 23:42:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1002. [2023-03-30 23:42:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 986 states have (on average 1.5446247464503042) internal successors, (1523), 988 states have internal predecessors, (1523), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2023-03-30 23:42:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1542 transitions. [2023-03-30 23:42:44,673 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1542 transitions. Word has length 17 [2023-03-30 23:42:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:42:44,673 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1542 transitions. [2023-03-30 23:42:44,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 23:42:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1542 transitions. [2023-03-30 23:42:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-03-30 23:42:44,676 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:42:44,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:44,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:42:44,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:42:44,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:42:44,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1415044033, now seen corresponding path program 1 times [2023-03-30 23:42:44,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:42:44,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932859541] [2023-03-30 23:42:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:44,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:42:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:44,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:42:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:44,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:42:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:42:45,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:42:45,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932859541] [2023-03-30 23:42:45,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932859541] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:42:45,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:42:45,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:42:45,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712851135] [2023-03-30 23:42:45,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:42:45,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:42:45,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:42:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:42:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:42:45,010 INFO L87 Difference]: Start difference. First operand 1002 states and 1542 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 4 states have internal predecessors, (82), 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 23:42:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:42:48,445 INFO L93 Difference]: Finished difference Result 2962 states and 4571 transitions. [2023-03-30 23:42:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:42:48,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 4 states have internal predecessors, (82), 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 88 [2023-03-30 23:42:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:42:48,452 INFO L225 Difference]: With dead ends: 2962 [2023-03-30 23:42:48,452 INFO L226 Difference]: Without dead ends: 1966 [2023-03-30 23:42:48,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:42:48,461 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1610 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 3480 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 4245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 3480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:42:48,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 332 Invalid, 4245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 3480 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:42:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2023-03-30 23:42:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1914. [2023-03-30 23:42:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1880 states have (on average 1.2920212765957446) internal successors, (2429), 1888 states have internal predecessors, (2429), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (43), 15 states have call predecessors, (43), 9 states have call successors, (43) [2023-03-30 23:42:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2482 transitions. [2023-03-30 23:42:48,572 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2482 transitions. Word has length 88 [2023-03-30 23:42:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:42:48,572 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 2482 transitions. [2023-03-30 23:42:48,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 4 states have internal predecessors, (82), 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 23:42:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2482 transitions. [2023-03-30 23:42:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-03-30 23:42:48,575 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:42:48,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:48,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:42:48,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:42:48,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:42:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash -193097043, now seen corresponding path program 1 times [2023-03-30 23:42:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:42:48,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479094047] [2023-03-30 23:42:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:48,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:42:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:48,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:42:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:48,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:42:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:42:48,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:42:48,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479094047] [2023-03-30 23:42:48,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479094047] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:42:48,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147517101] [2023-03-30 23:42:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:48,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:42:48,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:42:48,799 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 23:42:48,835 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 23:42:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:48,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:42:48,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:42:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:42:49,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:42:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:42:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147517101] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:42:49,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:42:49,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 6] total 10 [2023-03-30 23:42:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905553776] [2023-03-30 23:42:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:42:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:42:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:42:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:42:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:42:49,204 INFO L87 Difference]: Start difference. First operand 1914 states and 2482 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 23:42:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:42:50,965 INFO L93 Difference]: Finished difference Result 4730 states and 6286 transitions. [2023-03-30 23:42:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:42:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 91 [2023-03-30 23:42:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:42:50,972 INFO L225 Difference]: With dead ends: 4730 [2023-03-30 23:42:50,972 INFO L226 Difference]: Without dead ends: 2363 [2023-03-30 23:42:50,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:42:50,975 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 547 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:42:50,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 800 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:42:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2023-03-30 23:42:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2351. [2023-03-30 23:42:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2311 states have (on average 1.2219818260493294) internal successors, (2824), 2320 states have internal predecessors, (2824), 12 states have call successors, (12), 12 states have call predecessors, (12), 27 states have return successors, (63), 18 states have call predecessors, (63), 11 states have call successors, (63) [2023-03-30 23:42:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 2899 transitions. [2023-03-30 23:42:51,012 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 2899 transitions. Word has length 91 [2023-03-30 23:42:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:42:51,012 INFO L495 AbstractCegarLoop]: Abstraction has 2351 states and 2899 transitions. [2023-03-30 23:42:51,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 23:42:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 2899 transitions. [2023-03-30 23:42:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-30 23:42:51,022 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:42:51,022 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:42:51,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:42:51,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:42:51,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:42:51,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:42:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1355219970, now seen corresponding path program 1 times [2023-03-30 23:42:51,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:42:51,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789322271] [2023-03-30 23:42:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:51,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:42:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:51,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:42:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:51,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:42:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:51,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:42:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:42:51,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:42:51,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789322271] [2023-03-30 23:42:51,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789322271] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:42:51,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397559195] [2023-03-30 23:42:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:51,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:42:51,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:42:51,605 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 23:42:51,607 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 23:42:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:51,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:42:51,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:42:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:42:51,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:42:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:42:52,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397559195] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:42:52,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:42:52,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:42:52,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491436925] [2023-03-30 23:42:52,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:42:52,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:42:52,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:42:52,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:42:52,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:42:52,037 INFO L87 Difference]: Start difference. First operand 2351 states and 2899 transitions. Second operand has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 9 states have internal predecessors, (311), 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 23:42:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:42:55,098 INFO L93 Difference]: Finished difference Result 6068 states and 7768 transitions. [2023-03-30 23:42:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 23:42:55,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 9 states have internal predecessors, (311), 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 177 [2023-03-30 23:42:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:42:55,107 INFO L225 Difference]: With dead ends: 6068 [2023-03-30 23:42:55,107 INFO L226 Difference]: Without dead ends: 3723 [2023-03-30 23:42:55,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 356 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-03-30 23:42:55,111 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 3317 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3317 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 4731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:42:55,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3317 Valid, 306 Invalid, 4731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 3750 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-30 23:42:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2023-03-30 23:42:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3710. [2023-03-30 23:42:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 3634 states have (on average 1.2030820033021463) internal successors, (4372), 3655 states have internal predecessors, (4372), 18 states have call successors, (18), 18 states have call predecessors, (18), 57 states have return successors, (171), 36 states have call predecessors, (171), 17 states have call successors, (171) [2023-03-30 23:42:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 4561 transitions. [2023-03-30 23:42:55,160 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 4561 transitions. Word has length 177 [2023-03-30 23:42:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:42:55,161 INFO L495 AbstractCegarLoop]: Abstraction has 3710 states and 4561 transitions. [2023-03-30 23:42:55,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 9 states have internal predecessors, (311), 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 23:42:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 4561 transitions. [2023-03-30 23:42:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-03-30 23:42:55,163 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:42:55,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:42:55,168 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 23:42:55,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:42:55,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:42:55,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:42:55,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2093200824, now seen corresponding path program 1 times [2023-03-30 23:42:55,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:42:55,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764911454] [2023-03-30 23:42:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:55,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:42:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:55,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:42:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:55,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:42:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:55,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:42:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:55,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-03-30 23:42:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-03-30 23:42:55,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:42:55,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764911454] [2023-03-30 23:42:55,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764911454] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:42:55,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169180364] [2023-03-30 23:42:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:42:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:42:55,831 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 23:42:55,833 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 23:42:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:55,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:42:55,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:42:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-03-30 23:42:55,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:42:55,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169180364] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:42:55,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:42:55,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:42:55,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893236394] [2023-03-30 23:42:55,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:42:55,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:42:55,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:42:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:42:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:42:55,948 INFO L87 Difference]: Start difference. First operand 3710 states and 4561 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2023-03-30 23:42:57,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:42:57,159 INFO L93 Difference]: Finished difference Result 10492 states and 13080 transitions. [2023-03-30 23:42:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:42:57,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) Word has length 261 [2023-03-30 23:42:57,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:42:57,187 INFO L225 Difference]: With dead ends: 10492 [2023-03-30 23:42:57,187 INFO L226 Difference]: Without dead ends: 5903 [2023-03-30 23:42:57,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:42:57,195 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 439 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:42:57,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 850 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-30 23:42:57,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5903 states. [2023-03-30 23:42:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5903 to 5903. [2023-03-30 23:42:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5903 states, 5790 states have (on average 1.1378238341968911) internal successors, (6588), 5821 states have internal predecessors, (6588), 28 states have call successors, (28), 28 states have call predecessors, (28), 84 states have return successors, (311), 53 states have call predecessors, (311), 27 states have call successors, (311) [2023-03-30 23:42:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5903 states to 5903 states and 6927 transitions. [2023-03-30 23:42:57,266 INFO L78 Accepts]: Start accepts. Automaton has 5903 states and 6927 transitions. Word has length 261 [2023-03-30 23:42:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:42:57,266 INFO L495 AbstractCegarLoop]: Abstraction has 5903 states and 6927 transitions. [2023-03-30 23:42:57,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2023-03-30 23:42:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5903 states and 6927 transitions. [2023-03-30 23:42:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-03-30 23:42:57,269 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:42:57,269 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:42:57,276 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 23:42:57,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:42:57,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:42:57,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:42:57,475 INFO L85 PathProgramCache]: Analyzing trace with hash -804798237, now seen corresponding path program 1 times [2023-03-30 23:42:57,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:42:57,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803584992] [2023-03-30 23:42:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:57,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:42:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:57,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:42:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:57,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:42:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:57,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:42:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:57,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-03-30 23:42:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-03-30 23:42:57,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:42:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803584992] [2023-03-30 23:42:57,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803584992] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:42:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310840311] [2023-03-30 23:42:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:57,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:42:57,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:42:57,773 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 23:42:57,775 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 23:42:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:42:57,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:42:57,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:42:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-03-30 23:42:57,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:42:57,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310840311] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:42:57,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:42:57,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:42:57,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29854223] [2023-03-30 23:42:57,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:42:57,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:42:57,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:42:57,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:42:57,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:42:57,897 INFO L87 Difference]: Start difference. First operand 5903 states and 6927 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2023-03-30 23:42:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:42:59,289 INFO L93 Difference]: Finished difference Result 14882 states and 17854 transitions. [2023-03-30 23:42:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:42:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) Word has length 301 [2023-03-30 23:42:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:42:59,308 INFO L225 Difference]: With dead ends: 14882 [2023-03-30 23:42:59,309 INFO L226 Difference]: Without dead ends: 8085 [2023-03-30 23:42:59,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:42:59,317 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 498 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:42:59,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 712 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 23:42:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8085 states. [2023-03-30 23:42:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8085 to 8085. [2023-03-30 23:42:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8085 states, 7940 states have (on average 1.145088161209068) internal successors, (9092), 7978 states have internal predecessors, (9092), 38 states have call successors, (38), 38 states have call predecessors, (38), 106 states have return successors, (550), 68 states have call predecessors, (550), 37 states have call successors, (550) [2023-03-30 23:42:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 9680 transitions. [2023-03-30 23:42:59,549 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 9680 transitions. Word has length 301 [2023-03-30 23:42:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:42:59,550 INFO L495 AbstractCegarLoop]: Abstraction has 8085 states and 9680 transitions. [2023-03-30 23:42:59,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2023-03-30 23:42:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 9680 transitions. [2023-03-30 23:42:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-03-30 23:42:59,554 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:42:59,554 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:59,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-30 23:42:59,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:42:59,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:42:59,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:42:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash -803707839, now seen corresponding path program 1 times [2023-03-30 23:42:59,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:42:59,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206740388] [2023-03-30 23:42:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:42:59,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:42:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:43:00,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:43:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:43:00,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:43:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:43:00,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-03-30 23:43:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:43:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-30 23:43:00,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:43:00,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206740388] [2023-03-30 23:43:00,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206740388] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:43:00,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360049117] [2023-03-30 23:43:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:43:00,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:43:00,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:43:00,218 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:43:00,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:43:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:43:00,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-30 23:43:00,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:43:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-30 23:43:00,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:43:01,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360049117] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:43:01,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:43:01,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2023-03-30 23:43:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423534238] [2023-03-30 23:43:01,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 23:43:01,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:43:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:43:01,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:43:01,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:43:01,283 INFO L87 Difference]: Start difference. First operand 8085 states and 9680 transitions. Second operand has 11 states, 11 states have (on average 40.81818181818182) internal successors, (449), 9 states have internal predecessors, (449), 5 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:43:04,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:06,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:09,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:12,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:15,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:16,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:19,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:21,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:26,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:29,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:33,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:36,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:38,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:42,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:45,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-30 23:43:47,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0]