/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/Problem15_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:31:55,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:31:55,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:31:55,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:31:55,229 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 23:31:55,251 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:31:55,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:31:55,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:31:55,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:31:55,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:31:55,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:31:55,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:31:55,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:31:55,254 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:31:55,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:31:55,255 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:31:55,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:31:55,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:31:55,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:31:55,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:31:55,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:31:55,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:31:55,255 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:31:55,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:31:55,256 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:31:55,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:31:55,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:31:55,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:31:55,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:31:55,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:31:55,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:31:55,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:31:55,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:31:55,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:31:55,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:31:55,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:31:55,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:31:55,257 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:31:55,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:31:55,258 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:31:55,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:31:55,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:31:55,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:31:55,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:31:55,520 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:31:55,525 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:31:55,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label22.c [2023-03-30 23:31:56,644 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:31:56,993 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:31:56,993 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label22.c [2023-03-30 23:31:57,012 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6a36ad51/9be3ab469f6849449929b7f7ffac66d7/FLAG69cbee844 [2023-03-30 23:31:57,030 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6a36ad51/9be3ab469f6849449929b7f7ffac66d7 [2023-03-30 23:31:57,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:31:57,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:31:57,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:31:57,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:31:57,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:31:57,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:31:57" (1/1) ... [2023-03-30 23:31:57,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d32973b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:57, skipping insertion in model container [2023-03-30 23:31:57,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:31:57" (1/1) ... [2023-03-30 23:31:57,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:31:57,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:31:57,311 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/Problem15_label22.c[2348,2361] [2023-03-30 23:31:57,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:31:57,749 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:31:57,772 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/Problem15_label22.c[2348,2361] [2023-03-30 23:31:58,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:31:58,100 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:31:58,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58 WrapperNode [2023-03-30 23:31:58,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:31:58,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:31:58,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:31:58,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:31:58,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (1/1) ... [2023-03-30 23:31:58,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (1/1) ... [2023-03-30 23:31:58,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (1/1) ... [2023-03-30 23:31:58,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (1/1) ... [2023-03-30 23:31:58,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (1/1) ... [2023-03-30 23:31:58,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (1/1) ... [2023-03-30 23:31:58,261 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (1/1) ... [2023-03-30 23:31:58,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (1/1) ... [2023-03-30 23:31:58,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:31:58,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:31:58,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:31:58,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:31:58,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (1/1) ... [2023-03-30 23:31:58,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:31:58,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:31:58,317 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 23:31:58,325 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 23:31:58,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:31:58,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:31:58,360 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:31:58,360 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:31:58,360 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:31:58,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:31:58,360 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:31:58,360 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:31:58,360 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:31:58,360 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:31:58,361 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:31:58,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:31:58,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:31:58,361 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:31:58,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:31:58,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:31:58,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:31:58,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:31:58,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:31:58,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:31:58,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:31:58,460 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:31:58,470 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:32:00,962 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:32:00,980 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:32:00,980 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:32:00,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:32:00 BoogieIcfgContainer [2023-03-30 23:32:00,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:32:00,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:32:00,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:32:00,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:32:00,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:31:57" (1/3) ... [2023-03-30 23:32:00,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15982b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:32:00, skipping insertion in model container [2023-03-30 23:32:00,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:31:58" (2/3) ... [2023-03-30 23:32:00,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15982b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:32:00, skipping insertion in model container [2023-03-30 23:32:00,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:32:00" (3/3) ... [2023-03-30 23:32:00,996 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label22.c [2023-03-30 23:32:01,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:32:01,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:32:01,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:32:01,088 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;@652edf4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:32:01,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:32:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 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 23:32:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-30 23:32:01,103 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:01,103 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] [2023-03-30 23:32:01,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:01,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash 15391321, now seen corresponding path program 1 times [2023-03-30 23:32:01,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:01,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264466225] [2023-03-30 23:32:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:01,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:01,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:01,614 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 23:32:01,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264466225] [2023-03-30 23:32:01,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264466225] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:32:01,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:32:01,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:32:01,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029180238] [2023-03-30 23:32:01,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:32:01,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:32:01,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:32:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:32:01,657 INFO L87 Difference]: Start difference. First operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 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 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 23:32:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:05,285 INFO L93 Difference]: Finished difference Result 1240 states and 2220 transitions. [2023-03-30 23:32:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:32:05,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 24 [2023-03-30 23:32:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:05,308 INFO L225 Difference]: With dead ends: 1240 [2023-03-30 23:32:05,308 INFO L226 Difference]: Without dead ends: 724 [2023-03-30 23:32:05,318 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 23:32:05,322 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1113 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:05,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 91 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-30 23:32:05,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2023-03-30 23:32:05,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 712. [2023-03-30 23:32:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 696 states have (on average 1.5948275862068966) internal successors, (1110), 698 states have internal predecessors, (1110), 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 23:32:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1129 transitions. [2023-03-30 23:32:05,425 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1129 transitions. Word has length 24 [2023-03-30 23:32:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:05,426 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 1129 transitions. [2023-03-30 23:32:05,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 23:32:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1129 transitions. [2023-03-30 23:32:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-03-30 23:32:05,432 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:05,433 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:32:05,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:32:05,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:05,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1838492333, now seen corresponding path program 1 times [2023-03-30 23:32:05,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:05,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848015281] [2023-03-30 23:32:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:05,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:05,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:05,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:32:05,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:05,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848015281] [2023-03-30 23:32:05,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848015281] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:32:05,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:32:05,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:32:05,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993386782] [2023-03-30 23:32:05,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:32:05,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:32:05,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:32:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:32:05,924 INFO L87 Difference]: Start difference. First operand 712 states and 1129 transitions. Second operand has 7 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 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 23:32:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:09,487 INFO L93 Difference]: Finished difference Result 2095 states and 3368 transitions. [2023-03-30 23:32:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:32:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 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 96 [2023-03-30 23:32:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:09,495 INFO L225 Difference]: With dead ends: 2095 [2023-03-30 23:32:09,496 INFO L226 Difference]: Without dead ends: 1389 [2023-03-30 23:32:09,502 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 23:32:09,504 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1084 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:09,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 216 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2433 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-30 23:32:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2023-03-30 23:32:09,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1356. [2023-03-30 23:32:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1324 states have (on average 1.3799093655589123) internal successors, (1827), 1332 states have internal predecessors, (1827), 10 states have call successors, (10), 10 states have call predecessors, (10), 21 states have return successors, (38), 13 states have call predecessors, (38), 9 states have call successors, (38) [2023-03-30 23:32:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1875 transitions. [2023-03-30 23:32:09,568 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1875 transitions. Word has length 96 [2023-03-30 23:32:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:09,568 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 1875 transitions. [2023-03-30 23:32:09,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 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 23:32:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1875 transitions. [2023-03-30 23:32:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-03-30 23:32:09,576 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:09,576 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:32:09,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:32:09,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:09,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash 988875677, now seen corresponding path program 1 times [2023-03-30 23:32:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:09,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572793354] [2023-03-30 23:32:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:09,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:09,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:09,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:32:09,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:09,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572793354] [2023-03-30 23:32:09,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572793354] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410362195] [2023-03-30 23:32:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:09,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:09,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:09,844 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 23:32:09,872 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 23:32:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:09,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:32:09,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:32:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:32:10,052 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:32:10,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410362195] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:32:10,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:32:10,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:32:10,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385761351] [2023-03-30 23:32:10,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:32:10,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:32:10,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:32:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:32:10,054 INFO L87 Difference]: Start difference. First operand 1356 states and 1875 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 23:32:11,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:11,892 INFO L93 Difference]: Finished difference Result 3954 states and 5539 transitions. [2023-03-30 23:32:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:32:11,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 104 [2023-03-30 23:32:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:11,902 INFO L225 Difference]: With dead ends: 3954 [2023-03-30 23:32:11,902 INFO L226 Difference]: Without dead ends: 2604 [2023-03-30 23:32:11,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:32:11,906 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 323 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:11,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 651 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:32:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2023-03-30 23:32:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2604. [2023-03-30 23:32:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2549 states have (on average 1.2703020792467634) internal successors, (3238), 2563 states have internal predecessors, (3238), 18 states have call successors, (18), 18 states have call predecessors, (18), 36 states have return successors, (101), 22 states have call predecessors, (101), 17 states have call successors, (101) [2023-03-30 23:32:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3357 transitions. [2023-03-30 23:32:11,975 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3357 transitions. Word has length 104 [2023-03-30 23:32:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:11,975 INFO L495 AbstractCegarLoop]: Abstraction has 2604 states and 3357 transitions. [2023-03-30 23:32:11,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 23:32:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3357 transitions. [2023-03-30 23:32:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-30 23:32:11,977 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:11,977 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:32:11,987 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 23:32:12,183 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 23:32:12,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:12,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1356043565, now seen corresponding path program 1 times [2023-03-30 23:32:12,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:12,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003130252] [2023-03-30 23:32:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:12,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:12,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:12,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:32:12,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:12,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003130252] [2023-03-30 23:32:12,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003130252] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:32:12,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:32:12,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:32:12,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994262041] [2023-03-30 23:32:12,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:32:12,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:32:12,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:32:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:32:12,507 INFO L87 Difference]: Start difference. First operand 2604 states and 3357 transitions. Second operand has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 4 states have internal predecessors, (104), 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 23:32:15,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:15,714 INFO L93 Difference]: Finished difference Result 6527 states and 8715 transitions. [2023-03-30 23:32:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:32:15,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 4 states have internal predecessors, (104), 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 110 [2023-03-30 23:32:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:15,738 INFO L225 Difference]: With dead ends: 6527 [2023-03-30 23:32:15,738 INFO L226 Difference]: Without dead ends: 3929 [2023-03-30 23:32:15,747 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 23:32:15,752 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1718 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 2158 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:15,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 233 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2158 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-30 23:32:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2023-03-30 23:32:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3596. [2023-03-30 23:32:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3596 states, 3498 states have (on average 1.2284162378502002) internal successors, (4297), 3538 states have internal predecessors, (4297), 24 states have call successors, (24), 24 states have call predecessors, (24), 73 states have return successors, (223), 33 states have call predecessors, (223), 23 states have call successors, (223) [2023-03-30 23:32:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 4544 transitions. [2023-03-30 23:32:15,852 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 4544 transitions. Word has length 110 [2023-03-30 23:32:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:15,853 INFO L495 AbstractCegarLoop]: Abstraction has 3596 states and 4544 transitions. [2023-03-30 23:32:15,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 4 states have internal predecessors, (104), 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 23:32:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 4544 transitions. [2023-03-30 23:32:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-03-30 23:32:15,860 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:15,860 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:15,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 23:32:15,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:15,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1078347588, now seen corresponding path program 1 times [2023-03-30 23:32:15,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:15,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52104032] [2023-03-30 23:32:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:15,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:16,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:16,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:16,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-03-30 23:32:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-03-30 23:32:16,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:16,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52104032] [2023-03-30 23:32:16,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52104032] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:16,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882788350] [2023-03-30 23:32:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:16,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:16,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:16,404 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 23:32:16,429 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 23:32:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:16,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 23:32:16,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:32:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-03-30 23:32:16,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:32:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-03-30 23:32:17,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882788350] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:17,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:32:17,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2023-03-30 23:32:17,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756244500] [2023-03-30 23:32:17,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:32:17,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:32:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:17,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:32:17,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:32:17,322 INFO L87 Difference]: Start difference. First operand 3596 states and 4544 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:32:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:19,080 INFO L93 Difference]: Finished difference Result 9425 states and 12304 transitions. [2023-03-30 23:32:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:32:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 191 [2023-03-30 23:32:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:19,102 INFO L225 Difference]: With dead ends: 9425 [2023-03-30 23:32:19,102 INFO L226 Difference]: Without dead ends: 5835 [2023-03-30 23:32:19,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 382 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:32:19,110 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 646 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:19,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 204 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:32:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5835 states. [2023-03-30 23:32:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5835 to 5194. [2023-03-30 23:32:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5046 states have (on average 1.1860879904875148) internal successors, (5985), 5114 states have internal predecessors, (5985), 34 states have call successors, (34), 34 states have call predecessors, (34), 113 states have return successors, (350), 45 states have call predecessors, (350), 33 states have call successors, (350) [2023-03-30 23:32:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 6369 transitions. [2023-03-30 23:32:19,227 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 6369 transitions. Word has length 191 [2023-03-30 23:32:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:19,227 INFO L495 AbstractCegarLoop]: Abstraction has 5194 states and 6369 transitions. [2023-03-30 23:32:19,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:32:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 6369 transitions. [2023-03-30 23:32:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-03-30 23:32:19,231 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:19,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:19,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 23:32:19,437 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 23:32:19,438 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:19,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:19,438 INFO L85 PathProgramCache]: Analyzing trace with hash 460834901, now seen corresponding path program 1 times [2023-03-30 23:32:19,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:19,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130203788] [2023-03-30 23:32:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:19,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:20,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:20,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-30 23:32:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 85 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:32:20,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:20,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130203788] [2023-03-30 23:32:20,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130203788] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:20,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969250129] [2023-03-30 23:32:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:20,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:20,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:20,370 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 23:32:20,374 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 23:32:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:20,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:32:20,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:32:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-30 23:32:21,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:32:21,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969250129] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:32:21,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:32:21,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-30 23:32:21,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983401644] [2023-03-30 23:32:21,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:32:21,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:32:21,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:32:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:32:21,309 INFO L87 Difference]: Start difference. First operand 5194 states and 6369 transitions. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:32:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:23,665 INFO L93 Difference]: Finished difference Result 11408 states and 13937 transitions. [2023-03-30 23:32:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:32:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 293 [2023-03-30 23:32:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:23,700 INFO L225 Difference]: With dead ends: 11408 [2023-03-30 23:32:23,700 INFO L226 Difference]: Without dead ends: 6220 [2023-03-30 23:32:23,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:32:23,710 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 648 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:23,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 167 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-30 23:32:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6220 states. [2023-03-30 23:32:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6220 to 6163. [2023-03-30 23:32:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 5979 states have (on average 1.1630707476166584) internal successors, (6954), 6071 states have internal predecessors, (6954), 40 states have call successors, (40), 40 states have call predecessors, (40), 143 states have return successors, (434), 51 states have call predecessors, (434), 39 states have call successors, (434) [2023-03-30 23:32:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 7428 transitions. [2023-03-30 23:32:23,871 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 7428 transitions. Word has length 293 [2023-03-30 23:32:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:23,872 INFO L495 AbstractCegarLoop]: Abstraction has 6163 states and 7428 transitions. [2023-03-30 23:32:23,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:32:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 7428 transitions. [2023-03-30 23:32:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2023-03-30 23:32:23,878 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:23,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:23,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 23:32:24,082 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 23:32:24,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:24,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:24,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1110206134, now seen corresponding path program 1 times [2023-03-30 23:32:24,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:24,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231308368] [2023-03-30 23:32:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:24,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:24,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:24,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:25,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-03-30 23:32:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-03-30 23:32:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231308368] [2023-03-30 23:32:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231308368] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055486829] [2023-03-30 23:32:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:25,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:25,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:25,591 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 23:32:25,615 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 23:32:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:25,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:32:25,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:32:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-30 23:32:28,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:32:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-30 23:32:28,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055486829] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:28,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:32:28,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 7] total 16 [2023-03-30 23:32:28,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465221024] [2023-03-30 23:32:28,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:32:28,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:32:28,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:32:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:32:28,908 INFO L87 Difference]: Start difference. First operand 6163 states and 7428 transitions. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 23:32:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:30,607 INFO L93 Difference]: Finished difference Result 15458 states and 19208 transitions. [2023-03-30 23:32:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:32:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 379 [2023-03-30 23:32:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:30,635 INFO L225 Difference]: With dead ends: 15458 [2023-03-30 23:32:30,636 INFO L226 Difference]: Without dead ends: 7378 [2023-03-30 23:32:30,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 756 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:32:30,651 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 331 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:30,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 646 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 23:32:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2023-03-30 23:32:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 7376. [2023-03-30 23:32:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7181 states have (on average 1.0965046650884278) internal successors, (7874), 7274 states have internal predecessors, (7874), 48 states have call successors, (48), 48 states have call predecessors, (48), 146 states have return successors, (513), 53 states have call predecessors, (513), 47 states have call successors, (513) [2023-03-30 23:32:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 8435 transitions. [2023-03-30 23:32:30,833 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 8435 transitions. Word has length 379 [2023-03-30 23:32:30,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:30,833 INFO L495 AbstractCegarLoop]: Abstraction has 7376 states and 8435 transitions. [2023-03-30 23:32:30,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 23:32:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 8435 transitions. [2023-03-30 23:32:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2023-03-30 23:32:30,840 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:30,840 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:30,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:32:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:31,049 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:31,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1730706129, now seen corresponding path program 1 times [2023-03-30 23:32:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:31,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016358030] [2023-03-30 23:32:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:31,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:31,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:31,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:31,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-03-30 23:32:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:32:31,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:31,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016358030] [2023-03-30 23:32:31,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016358030] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:31,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341226554] [2023-03-30 23:32:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:31,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:31,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:31,637 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 23:32:31,659 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 23:32:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:31,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:32:31,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:32:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:32:31,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:32:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:32:32,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341226554] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:32:32,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:32:32,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:32:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333431855] [2023-03-30 23:32:32,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:32:32,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:32:32,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:32,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:32:32,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:32:32,240 INFO L87 Difference]: Start difference. First operand 7376 states and 8435 transitions. Second operand has 12 states, 12 states have (on average 46.5) internal successors, (558), 10 states have internal predecessors, (558), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:32:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:35,828 INFO L93 Difference]: Finished difference Result 17945 states and 21112 transitions. [2023-03-30 23:32:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 23:32:35,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 46.5) internal successors, (558), 10 states have internal predecessors, (558), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 395 [2023-03-30 23:32:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:35,860 INFO L225 Difference]: With dead ends: 17945 [2023-03-30 23:32:35,860 INFO L226 Difference]: Without dead ends: 10882 [2023-03-30 23:32:35,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 793 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-03-30 23:32:35,878 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 3264 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 3237 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3264 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 3878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 3237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:35,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3264 Valid, 255 Invalid, 3878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 3237 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:32:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10882 states. [2023-03-30 23:32:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10882 to 9940. [2023-03-30 23:32:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9940 states, 9663 states have (on average 1.074097071302908) internal successors, (10379), 9802 states have internal predecessors, (10379), 64 states have call successors, (64), 64 states have call predecessors, (64), 212 states have return successors, (702), 73 states have call predecessors, (702), 63 states have call successors, (702) [2023-03-30 23:32:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9940 states to 9940 states and 11145 transitions. [2023-03-30 23:32:36,152 INFO L78 Accepts]: Start accepts. Automaton has 9940 states and 11145 transitions. Word has length 395 [2023-03-30 23:32:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:36,153 INFO L495 AbstractCegarLoop]: Abstraction has 9940 states and 11145 transitions. [2023-03-30 23:32:36,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 46.5) internal successors, (558), 10 states have internal predecessors, (558), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:32:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9940 states and 11145 transitions. [2023-03-30 23:32:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-03-30 23:32:36,156 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:36,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:32:36,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:32:36,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:36,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:36,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:36,364 INFO L85 PathProgramCache]: Analyzing trace with hash -108850539, now seen corresponding path program 1 times [2023-03-30 23:32:36,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:36,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116499690] [2023-03-30 23:32:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:36,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:36,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:36,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:36,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:32:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-03-30 23:32:36,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:36,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116499690] [2023-03-30 23:32:36,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116499690] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:36,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638345150] [2023-03-30 23:32:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:36,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:36,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:36,849 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:32:36,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:32:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:37,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:32:37,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:32:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-03-30 23:32:37,054 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:32:37,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638345150] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:32:37,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:32:37,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:32:37,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117106745] [2023-03-30 23:32:37,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:32:37,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:32:37,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:37,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:32:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:32:37,057 INFO L87 Difference]: Start difference. First operand 9940 states and 11145 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 23:32:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:38,643 INFO L93 Difference]: Finished difference Result 19557 states and 21974 transitions. [2023-03-30 23:32:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:32:38,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 409 [2023-03-30 23:32:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:38,684 INFO L225 Difference]: With dead ends: 19557 [2023-03-30 23:32:38,684 INFO L226 Difference]: Without dead ends: 9930 [2023-03-30 23:32:38,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:32:38,705 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 357 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:38,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 505 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 23:32:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9930 states. [2023-03-30 23:32:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9930 to 9926. [2023-03-30 23:32:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9926 states, 9653 states have (on average 1.0609137055837563) internal successors, (10241), 9788 states have internal predecessors, (10241), 64 states have call successors, (64), 64 states have call predecessors, (64), 208 states have return successors, (586), 73 states have call predecessors, (586), 63 states have call successors, (586) [2023-03-30 23:32:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 10891 transitions. [2023-03-30 23:32:38,889 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 10891 transitions. Word has length 409 [2023-03-30 23:32:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:38,890 INFO L495 AbstractCegarLoop]: Abstraction has 9926 states and 10891 transitions. [2023-03-30 23:32:38,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 23:32:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 10891 transitions. [2023-03-30 23:32:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-03-30 23:32:38,894 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:38,894 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:38,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 23:32:39,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:39,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:39,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1948324509, now seen corresponding path program 1 times [2023-03-30 23:32:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:39,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385458836] [2023-03-30 23:32:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:39,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:39,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:39,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:39,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:32:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:39,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-03-30 23:32:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-03-30 23:32:39,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:39,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385458836] [2023-03-30 23:32:39,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385458836] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:39,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473589801] [2023-03-30 23:32:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:39,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:39,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:39,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:32:39,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 23:32:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:39,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:32:39,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:32:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-03-30 23:32:39,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:32:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-03-30 23:32:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473589801] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:32:40,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:32:40,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:32:40,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466907735] [2023-03-30 23:32:40,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:32:40,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:32:40,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:32:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:32:40,235 INFO L87 Difference]: Start difference. First operand 9926 states and 10891 transitions. Second operand has 11 states, 11 states have (on average 47.54545454545455) internal successors, (523), 9 states have internal predecessors, (523), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:32:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:43,122 INFO L93 Difference]: Finished difference Result 19270 states and 21172 transitions. [2023-03-30 23:32:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-30 23:32:43,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 47.54545454545455) internal successors, (523), 9 states have internal predecessors, (523), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 487 [2023-03-30 23:32:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:43,160 INFO L225 Difference]: With dead ends: 19270 [2023-03-30 23:32:43,161 INFO L226 Difference]: Without dead ends: 9657 [2023-03-30 23:32:43,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1015 GetRequests, 989 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-03-30 23:32:43,178 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 2106 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 3511 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 3868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 3511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:43,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2106 Valid, 350 Invalid, 3868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 3511 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-30 23:32:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2023-03-30 23:32:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 9636. [2023-03-30 23:32:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9636 states, 9357 states have (on average 1.0553596238110505) internal successors, (9875), 9502 states have internal predecessors, (9875), 62 states have call successors, (62), 62 states have call predecessors, (62), 216 states have return successors, (520), 71 states have call predecessors, (520), 61 states have call successors, (520) [2023-03-30 23:32:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9636 states to 9636 states and 10457 transitions. [2023-03-30 23:32:43,360 INFO L78 Accepts]: Start accepts. Automaton has 9636 states and 10457 transitions. Word has length 487 [2023-03-30 23:32:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:43,361 INFO L495 AbstractCegarLoop]: Abstraction has 9636 states and 10457 transitions. [2023-03-30 23:32:43,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 47.54545454545455) internal successors, (523), 9 states have internal predecessors, (523), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:32:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 9636 states and 10457 transitions. [2023-03-30 23:32:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-03-30 23:32:43,369 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:43,369 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:43,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 23:32:43,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:43,579 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:43,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:43,579 INFO L85 PathProgramCache]: Analyzing trace with hash -622361378, now seen corresponding path program 1 times [2023-03-30 23:32:43,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:43,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132577483] [2023-03-30 23:32:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:44,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:44,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:32:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:44,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-03-30 23:32:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:44,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 519 [2023-03-30 23:32:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 310 proven. 71 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-03-30 23:32:44,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132577483] [2023-03-30 23:32:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132577483] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513314230] [2023-03-30 23:32:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:44,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:44,404 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:32:44,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 23:32:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:44,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:32:44,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:32:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2023-03-30 23:32:44,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:32:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2023-03-30 23:32:45,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513314230] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:32:45,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:32:45,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-03-30 23:32:45,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021600472] [2023-03-30 23:32:45,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:32:45,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 23:32:45,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 23:32:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:32:45,072 INFO L87 Difference]: Start difference. First operand 9636 states and 10457 transitions. Second operand has 13 states, 13 states have (on average 43.84615384615385) internal successors, (570), 11 states have internal predecessors, (570), 5 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9)