/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:48:40,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:48:40,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:48:40,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:48:40,899 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 [2023-04-01 22:48:40,931 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:48:40,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:48:40,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:48:40,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:48:40,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:48:40,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:48:40,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:48:40,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:48:40,934 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:48:40,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:48:40,935 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:48:40,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:48:40,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:48:40,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:48:40,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:48:40,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:48:40,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:48:40,936 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:48:40,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:48:40,936 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:48:40,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:48:40,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:48:40,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:48:40,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:48:40,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:48:40,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:48:40,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:48:40,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:48:40,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:48:40,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:48:40,939 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:48:40,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:48:40,940 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:48:40,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:48:40,940 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:48:40,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:48:41,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:48:41,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:48:41,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:48:41,212 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:48:41,212 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:48:41,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label53.c [2023-04-01 22:48:42,502 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:48:42,940 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:48:42,940 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label53.c [2023-04-01 22:48:42,976 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6137ad75d/35f149cd656c4fb0ad53145ddde3b832/FLAGbed357aca [2023-04-01 22:48:42,995 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6137ad75d/35f149cd656c4fb0ad53145ddde3b832 [2023-04-01 22:48:42,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:48:42,998 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:48:43,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:48:43,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:48:43,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:48:43,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:48:42" (1/1) ... [2023-04-01 22:48:43,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4abdbdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:43, skipping insertion in model container [2023-04-01 22:48:43,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:48:42" (1/1) ... [2023-04-01 22:48:43,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:48:43,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:48:43,414 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label53.c[4658,4671] [2023-04-01 22:48:44,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:48:44,226 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:48:44,254 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label53.c[4658,4671] [2023-04-01 22:48:44,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:48:44,669 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:48:44,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44 WrapperNode [2023-04-01 22:48:44,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:48:44,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:48:44,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:48:44,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:48:44,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (1/1) ... [2023-04-01 22:48:44,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (1/1) ... [2023-04-01 22:48:44,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (1/1) ... [2023-04-01 22:48:44,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (1/1) ... [2023-04-01 22:48:44,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (1/1) ... [2023-04-01 22:48:44,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (1/1) ... [2023-04-01 22:48:44,914 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (1/1) ... [2023-04-01 22:48:44,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (1/1) ... [2023-04-01 22:48:44,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:48:44,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:48:44,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:48:44,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:48:44,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (1/1) ... [2023-04-01 22:48:44,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:48:44,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:48:44,999 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) [2023-04-01 22:48:45,070 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 [2023-04-01 22:48:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:48:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:48:45,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:48:45,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:48:45,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:48:45,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:48:45,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:48:45,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:48:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:48:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:48:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:48:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:48:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:48:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:48:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:48:45,220 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:48:45,222 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:48:49,917 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:48:49,930 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:48:49,930 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:48:49,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:48:49 BoogieIcfgContainer [2023-04-01 22:48:49,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:48:49,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:48:49,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:48:49,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:48:49,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:48:42" (1/3) ... [2023-04-01 22:48:49,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f81af79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:48:49, skipping insertion in model container [2023-04-01 22:48:49,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:48:44" (2/3) ... [2023-04-01 22:48:49,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f81af79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:48:49, skipping insertion in model container [2023-04-01 22:48:49,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:48:49" (3/3) ... [2023-04-01 22:48:49,940 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label53.c [2023-04-01 22:48:49,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:48:49,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:48:50,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:48:50,026 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;@39d23bd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:48:50,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:48:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 22:48:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 22:48:50,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:50,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:48:50,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:50,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1819438468, now seen corresponding path program 1 times [2023-04-01 22:48:50,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:50,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329590577] [2023-04-01 22:48:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:50,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:50,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:48:50,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329590577] [2023-04-01 22:48:50,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329590577] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:48:50,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:48:50,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:48:50,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676747568] [2023-04-01 22:48:50,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:48:50,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:48:50,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:50,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:48:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:48:50,662 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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) [2023-04-01 22:48:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:48:57,068 INFO L93 Difference]: Finished difference Result 3230 states and 5909 transitions. [2023-04-01 22:48:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:48:57,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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 37 [2023-04-01 22:48:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:48:57,099 INFO L225 Difference]: With dead ends: 3230 [2023-04-01 22:48:57,100 INFO L226 Difference]: Without dead ends: 2026 [2023-04-01 22:48:57,111 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 [2023-04-01 22:48:57,116 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 3028 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3028 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 4486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:48:57,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3028 Valid, 300 Invalid, 5089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-04-01 22:48:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2023-04-01 22:48:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2009. [2023-04-01 22:48:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1981 states have (on average 1.6436143361938416) internal successors, (3256), 1983 states have internal predecessors, (3256), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-04-01 22:48:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3291 transitions. [2023-04-01 22:48:57,295 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3291 transitions. Word has length 37 [2023-04-01 22:48:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:48:57,295 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 3291 transitions. [2023-04-01 22:48:57,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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) [2023-04-01 22:48:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3291 transitions. [2023-04-01 22:48:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 22:48:57,299 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:57,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:48:57,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:48:57,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:57,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:57,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1293413257, now seen corresponding path program 1 times [2023-04-01 22:48:57,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:57,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752883859] [2023-04-01 22:48:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:57,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:57,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:57,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:48:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:48:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752883859] [2023-04-01 22:48:57,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752883859] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:48:57,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:48:57,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:48:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131981477] [2023-04-01 22:48:57,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:48:57,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:48:57,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:48:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:48:57,865 INFO L87 Difference]: Start difference. First operand 2009 states and 3291 transitions. Second operand has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 4 states have internal predecessors, (106), 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) [2023-04-01 22:49:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:05,824 INFO L93 Difference]: Finished difference Result 5863 states and 9700 transitions. [2023-04-01 22:49:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:49:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 4 states have internal predecessors, (106), 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 112 [2023-04-01 22:49:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:05,850 INFO L225 Difference]: With dead ends: 5863 [2023-04-01 22:49:05,851 INFO L226 Difference]: Without dead ends: 3860 [2023-04-01 22:49:05,855 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 [2023-04-01 22:49:05,856 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 3296 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 7739 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 8924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 7739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:05,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3296 Valid, 815 Invalid, 8924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 7739 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-04-01 22:49:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2023-04-01 22:49:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3760. [2023-04-01 22:49:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3760 states, 3688 states have (on average 1.4899674620390455) internal successors, (5495), 3700 states have internal predecessors, (5495), 18 states have call successors, (18), 18 states have call predecessors, (18), 53 states have return successors, (117), 41 states have call predecessors, (117), 17 states have call successors, (117) [2023-04-01 22:49:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 5630 transitions. [2023-04-01 22:49:05,970 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 5630 transitions. Word has length 112 [2023-04-01 22:49:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:05,971 INFO L495 AbstractCegarLoop]: Abstraction has 3760 states and 5630 transitions. [2023-04-01 22:49:05,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 4 states have internal predecessors, (106), 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) [2023-04-01 22:49:05,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 5630 transitions. [2023-04-01 22:49:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 22:49:05,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:05,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:05,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:49:05,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:05,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1589500645, now seen corresponding path program 1 times [2023-04-01 22:49:05,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:05,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090206737] [2023-04-01 22:49:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:05,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:06,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:49:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:06,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090206737] [2023-04-01 22:49:06,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090206737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:06,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:49:06,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:49:06,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331870425] [2023-04-01 22:49:06,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:06,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:49:06,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:06,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:49:06,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:06,383 INFO L87 Difference]: Start difference. First operand 3760 states and 5630 transitions. Second operand has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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) [2023-04-01 22:49:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:14,871 INFO L93 Difference]: Finished difference Result 14591 states and 22901 transitions. [2023-04-01 22:49:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:49:14,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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 126 [2023-04-01 22:49:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:14,921 INFO L225 Difference]: With dead ends: 14591 [2023-04-01 22:49:14,922 INFO L226 Difference]: Without dead ends: 10837 [2023-04-01 22:49:14,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:49:14,939 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 4932 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 8284 mSolverCounterSat, 1969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4932 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 10253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1969 IncrementalHoareTripleChecker+Valid, 8284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:14,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4932 Valid, 813 Invalid, 10253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1969 Valid, 8284 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-04-01 22:49:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10837 states. [2023-04-01 22:49:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 10751. [2023-04-01 22:49:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10751 states, 10420 states have (on average 1.3433781190019194) internal successors, (13998), 10488 states have internal predecessors, (13998), 50 states have call successors, (50), 50 states have call predecessors, (50), 280 states have return successors, (1257), 212 states have call predecessors, (1257), 49 states have call successors, (1257) [2023-04-01 22:49:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 15305 transitions. [2023-04-01 22:49:15,236 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 15305 transitions. Word has length 126 [2023-04-01 22:49:15,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:15,238 INFO L495 AbstractCegarLoop]: Abstraction has 10751 states and 15305 transitions. [2023-04-01 22:49:15,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 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) [2023-04-01 22:49:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 15305 transitions. [2023-04-01 22:49:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 22:49:15,241 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:15,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:15,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:49:15,241 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:15,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1079086728, now seen corresponding path program 1 times [2023-04-01 22:49:15,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:15,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388130258] [2023-04-01 22:49:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:15,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:15,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:15,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:49:15,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:15,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388130258] [2023-04-01 22:49:15,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388130258] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:15,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:49:15,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:49:15,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594833202] [2023-04-01 22:49:15,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:15,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:49:15,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:15,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:49:15,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:15,629 INFO L87 Difference]: Start difference. First operand 10751 states and 15305 transitions. Second operand has 8 states, 7 states have (on average 21.285714285714285) internal successors, (149), 5 states have internal predecessors, (149), 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) [2023-04-01 22:49:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:23,649 INFO L93 Difference]: Finished difference Result 39561 states and 60675 transitions. [2023-04-01 22:49:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:49:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.285714285714285) internal successors, (149), 5 states have internal predecessors, (149), 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 155 [2023-04-01 22:49:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:23,789 INFO L225 Difference]: With dead ends: 39561 [2023-04-01 22:49:23,790 INFO L226 Difference]: Without dead ends: 28816 [2023-04-01 22:49:23,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:49:23,841 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 5236 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 7481 mSolverCounterSat, 2178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5236 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 9659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2178 IncrementalHoareTripleChecker+Valid, 7481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:23,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5236 Valid, 569 Invalid, 9659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2178 Valid, 7481 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-04-01 22:49:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28816 states. [2023-04-01 22:49:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28816 to 28710. [2023-04-01 22:49:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28710 states, 27783 states have (on average 1.2116402116402116) internal successors, (33663), 28013 states have internal predecessors, (33663), 134 states have call successors, (134), 134 states have call predecessors, (134), 792 states have return successors, (5011), 562 states have call predecessors, (5011), 133 states have call successors, (5011) [2023-04-01 22:49:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28710 states to 28710 states and 38808 transitions. [2023-04-01 22:49:24,651 INFO L78 Accepts]: Start accepts. Automaton has 28710 states and 38808 transitions. Word has length 155 [2023-04-01 22:49:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:24,652 INFO L495 AbstractCegarLoop]: Abstraction has 28710 states and 38808 transitions. [2023-04-01 22:49:24,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.285714285714285) internal successors, (149), 5 states have internal predecessors, (149), 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) [2023-04-01 22:49:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 28710 states and 38808 transitions. [2023-04-01 22:49:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-04-01 22:49:24,660 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:24,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:24,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 22:49:24,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:24,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:24,661 INFO L85 PathProgramCache]: Analyzing trace with hash -915012552, now seen corresponding path program 1 times [2023-04-01 22:49:24,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046159442] [2023-04-01 22:49:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:24,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:24,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:24,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:24,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:49:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:49:24,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:24,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046159442] [2023-04-01 22:49:24,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046159442] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:25,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481726126] [2023-04-01 22:49:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:25,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:25,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:25,009 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) [2023-04-01 22:49:25,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:49:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:25,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:25,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:49:25,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:25,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481726126] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:25,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:25,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:49:25,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70090793] [2023-04-01 22:49:25,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:25,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:49:25,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:25,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:49:25,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:25,265 INFO L87 Difference]: Start difference. First operand 28710 states and 38808 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2023-04-01 22:49:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:29,154 INFO L93 Difference]: Finished difference Result 64221 states and 88794 transitions. [2023-04-01 22:49:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:49:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 237 [2023-04-01 22:49:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:29,314 INFO L225 Difference]: With dead ends: 64221 [2023-04-01 22:49:29,314 INFO L226 Difference]: Without dead ends: 35517 [2023-04-01 22:49:29,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:29,385 INFO L413 NwaCegarLoop]: 1900 mSDtfsCounter, 829 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:29,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 2073 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 2584 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 22:49:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35517 states. [2023-04-01 22:49:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35517 to 35496. [2023-04-01 22:49:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35496 states, 34367 states have (on average 1.1874763581342567) internal successors, (40810), 34651 states have internal predecessors, (40810), 166 states have call successors, (166), 166 states have call predecessors, (166), 962 states have return successors, (6525), 678 states have call predecessors, (6525), 165 states have call successors, (6525) [2023-04-01 22:49:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35496 states to 35496 states and 47501 transitions. [2023-04-01 22:49:30,256 INFO L78 Accepts]: Start accepts. Automaton has 35496 states and 47501 transitions. Word has length 237 [2023-04-01 22:49:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:30,257 INFO L495 AbstractCegarLoop]: Abstraction has 35496 states and 47501 transitions. [2023-04-01 22:49:30,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2023-04-01 22:49:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 35496 states and 47501 transitions. [2023-04-01 22:49:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-04-01 22:49:30,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:30,262 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:49:30,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:30,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:30,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:30,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:30,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1225547122, now seen corresponding path program 1 times [2023-04-01 22:49:30,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:30,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223394800] [2023-04-01 22:49:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:30,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:30,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:30,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:30,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:49:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-04-01 22:49:30,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223394800] [2023-04-01 22:49:30,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223394800] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339335253] [2023-04-01 22:49:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:30,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:30,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:30,910 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) [2023-04-01 22:49:30,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:49:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:31,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:31,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:49:31,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:31,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339335253] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:31,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:31,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:49:31,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187020855] [2023-04-01 22:49:31,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:31,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:49:31,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:31,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:49:31,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:31,117 INFO L87 Difference]: Start difference. First operand 35496 states and 47501 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-04-01 22:49:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:34,256 INFO L93 Difference]: Finished difference Result 70987 states and 95070 transitions. [2023-04-01 22:49:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:49:34,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 246 [2023-04-01 22:49:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:34,364 INFO L225 Difference]: With dead ends: 70987 [2023-04-01 22:49:34,364 INFO L226 Difference]: Without dead ends: 35497 [2023-04-01 22:49:34,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:34,435 INFO L413 NwaCegarLoop]: 1409 mSDtfsCounter, 1195 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:34,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 1514 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 22:49:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2023-04-01 22:49:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 33082. [2023-04-01 22:49:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33082 states, 31979 states have (on average 1.1349635698427092) internal successors, (36295), 32262 states have internal predecessors, (36295), 154 states have call successors, (154), 154 states have call predecessors, (154), 948 states have return successors, (4569), 665 states have call predecessors, (4569), 153 states have call successors, (4569) [2023-04-01 22:49:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33082 states to 33082 states and 41018 transitions. [2023-04-01 22:49:35,193 INFO L78 Accepts]: Start accepts. Automaton has 33082 states and 41018 transitions. Word has length 246 [2023-04-01 22:49:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:35,194 INFO L495 AbstractCegarLoop]: Abstraction has 33082 states and 41018 transitions. [2023-04-01 22:49:35,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-04-01 22:49:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 33082 states and 41018 transitions. [2023-04-01 22:49:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-04-01 22:49:35,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:35,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:35,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:35,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 22:49:35,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:35,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:35,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1777461075, now seen corresponding path program 1 times [2023-04-01 22:49:35,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:35,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852892030] [2023-04-01 22:49:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:35,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:35,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:35,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:35,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:49:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:49:35,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:35,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852892030] [2023-04-01 22:49:35,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852892030] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:35,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433252217] [2023-04-01 22:49:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:35,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:35,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:35,743 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) [2023-04-01 22:49:35,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:49:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:35,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:35,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:49:35,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:35,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433252217] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:35,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:35,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 22:49:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038269557] [2023-04-01 22:49:35,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:35,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:49:35,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:49:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:35,915 INFO L87 Difference]: Start difference. First operand 33082 states and 41018 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2023-04-01 22:49:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:39,654 INFO L93 Difference]: Finished difference Result 74449 states and 94404 transitions. [2023-04-01 22:49:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:49:39,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 259 [2023-04-01 22:49:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:39,803 INFO L225 Difference]: With dead ends: 74449 [2023-04-01 22:49:39,807 INFO L226 Difference]: Without dead ends: 41373 [2023-04-01 22:49:39,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:49:39,869 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 998 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:39,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 899 Invalid, 3312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 22:49:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41373 states. [2023-04-01 22:49:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41373 to 40544. [2023-04-01 22:49:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40544 states, 39277 states have (on average 1.1176260916057743) internal successors, (43897), 39601 states have internal predecessors, (43897), 190 states have call successors, (190), 190 states have call predecessors, (190), 1076 states have return successors, (5750), 752 states have call predecessors, (5750), 189 states have call successors, (5750) [2023-04-01 22:49:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40544 states to 40544 states and 49837 transitions. [2023-04-01 22:49:40,737 INFO L78 Accepts]: Start accepts. Automaton has 40544 states and 49837 transitions. Word has length 259 [2023-04-01 22:49:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:40,738 INFO L495 AbstractCegarLoop]: Abstraction has 40544 states and 49837 transitions. [2023-04-01 22:49:40,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2023-04-01 22:49:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 40544 states and 49837 transitions. [2023-04-01 22:49:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2023-04-01 22:49:40,750 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:40,750 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 22:49:40,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:40,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:40,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:40,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:40,958 INFO L85 PathProgramCache]: Analyzing trace with hash -132624355, now seen corresponding path program 1 times [2023-04-01 22:49:40,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:40,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442110113] [2023-04-01 22:49:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:40,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:41,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:41,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:42,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:49:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:42,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-04-01 22:49:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 95 proven. 237 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:49:42,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442110113] [2023-04-01 22:49:42,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442110113] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:42,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942042495] [2023-04-01 22:49:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:42,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:42,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:42,145 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) [2023-04-01 22:49:42,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:49:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:42,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:42,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 251 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:49:42,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:49:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 251 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:49:42,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942042495] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:49:42,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:49:42,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2023-04-01 22:49:42,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101937192] [2023-04-01 22:49:42,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:49:42,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 22:49:42,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 22:49:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:49:42,752 INFO L87 Difference]: Start difference. First operand 40544 states and 49837 transitions. Second operand has 15 states, 15 states have (on average 34.6) internal successors, (519), 13 states have internal predecessors, (519), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 22:49:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:58,803 INFO L93 Difference]: Finished difference Result 109044 states and 134997 transitions. [2023-04-01 22:49:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-01 22:49:58,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 34.6) internal successors, (519), 13 states have internal predecessors, (519), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 328 [2023-04-01 22:49:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:58,965 INFO L225 Difference]: With dead ends: 109044 [2023-04-01 22:49:58,966 INFO L226 Difference]: Without dead ends: 68506 [2023-04-01 22:49:59,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 736 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3744 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=9229, Unknown=0, NotChecked=0, Total=10506 [2023-04-01 22:49:59,014 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 32745 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 16490 mSolverCounterSat, 5255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32758 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 21745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5255 IncrementalHoareTripleChecker+Valid, 16490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:59,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32758 Valid, 2062 Invalid, 21745 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5255 Valid, 16490 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2023-04-01 22:49:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68506 states. [2023-04-01 22:50:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68506 to 65707. [2023-04-01 22:50:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65707 states, 63728 states have (on average 1.0741118503640472) internal successors, (68451), 64297 states have internal predecessors, (68451), 321 states have call successors, (321), 310 states have call predecessors, (321), 1657 states have return successors, (8073), 1099 states have call predecessors, (8073), 320 states have call successors, (8073) [2023-04-01 22:50:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65707 states to 65707 states and 76845 transitions. [2023-04-01 22:50:00,551 INFO L78 Accepts]: Start accepts. Automaton has 65707 states and 76845 transitions. Word has length 328 [2023-04-01 22:50:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:50:00,552 INFO L495 AbstractCegarLoop]: Abstraction has 65707 states and 76845 transitions. [2023-04-01 22:50:00,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 34.6) internal successors, (519), 13 states have internal predecessors, (519), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 22:50:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 65707 states and 76845 transitions. [2023-04-01 22:50:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-04-01 22:50:00,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:50:00,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:50:00,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:50:00,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:00,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:50:00,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:50:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1333897672, now seen corresponding path program 1 times [2023-04-01 22:50:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:50:00,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104260456] [2023-04-01 22:50:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:50:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:01,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:50:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:01,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:50:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:01,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:50:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:50:01,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:50:01,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104260456] [2023-04-01 22:50:01,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104260456] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:50:01,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786584055] [2023-04-01 22:50:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:01,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:01,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:50:01,492 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) [2023-04-01 22:50:01,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:50:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:01,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:50:01,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:50:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 22:50:02,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:50:02,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786584055] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:50:02,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:50:02,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 22:50:02,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330527070] [2023-04-01 22:50:02,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:50:02,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:50:02,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:50:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:50:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:50:02,050 INFO L87 Difference]: Start difference. First operand 65707 states and 76845 transitions. Second operand has 5 states, 5 states have (on average 61.0) internal successors, (305), 4 states have internal predecessors, (305), 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) [2023-04-01 22:50:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:50:07,224 INFO L93 Difference]: Finished difference Result 142567 states and 167003 transitions. [2023-04-01 22:50:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 22:50:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 61.0) internal successors, (305), 4 states have internal predecessors, (305), 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 342 [2023-04-01 22:50:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:50:07,392 INFO L225 Difference]: With dead ends: 142567 [2023-04-01 22:50:07,392 INFO L226 Difference]: Without dead ends: 76866 [2023-04-01 22:50:07,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:50:07,439 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 2677 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 5133 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2677 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 6033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 5133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:50:07,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2677 Valid, 558 Invalid, 6033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 5133 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 22:50:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76866 states. [2023-04-01 22:50:08,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76866 to 75667. [2023-04-01 22:50:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75667 states, 73466 states have (on average 1.0677728473035146) internal successors, (78445), 74099 states have internal predecessors, (78445), 371 states have call successors, (371), 358 states have call predecessors, (371), 1829 states have return successors, (9188), 1209 states have call predecessors, (9188), 370 states have call successors, (9188) [2023-04-01 22:50:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75667 states to 75667 states and 88004 transitions. [2023-04-01 22:50:08,958 INFO L78 Accepts]: Start accepts. Automaton has 75667 states and 88004 transitions. Word has length 342 [2023-04-01 22:50:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:50:08,959 INFO L495 AbstractCegarLoop]: Abstraction has 75667 states and 88004 transitions. [2023-04-01 22:50:08,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.0) internal successors, (305), 4 states have internal predecessors, (305), 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) [2023-04-01 22:50:08,959 INFO L276 IsEmpty]: Start isEmpty. Operand 75667 states and 88004 transitions. [2023-04-01 22:50:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-04-01 22:50:08,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:50:08,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:50:09,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:50:09,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:09,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:50:09,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:50:09,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1685815642, now seen corresponding path program 1 times [2023-04-01 22:50:09,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:50:09,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944493019] [2023-04-01 22:50:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:50:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:09,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:50:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:09,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:50:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:50:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:50:09,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:50:09,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944493019] [2023-04-01 22:50:09,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944493019] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:50:09,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834915065] [2023-04-01 22:50:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:09,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:09,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:50:09,812 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) [2023-04-01 22:50:09,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:50:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:09,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:50:09,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:50:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-04-01 22:50:10,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:50:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 64 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:50:11,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834915065] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:50:11,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:50:11,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-04-01 22:50:11,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549380909] [2023-04-01 22:50:11,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:50:11,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 22:50:11,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:50:11,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 22:50:11,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-04-01 22:50:11,331 INFO L87 Difference]: Start difference. First operand 75667 states and 88004 transitions. Second operand has 17 states, 17 states have (on average 51.0) internal successors, (867), 15 states have internal predecessors, (867), 7 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 22:50:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:50:40,180 INFO L93 Difference]: Finished difference Result 321243 states and 385882 transitions. [2023-04-01 22:50:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-04-01 22:50:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 51.0) internal successors, (867), 15 states have internal predecessors, (867), 7 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 349 [2023-04-01 22:50:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:50:41,050 INFO L225 Difference]: With dead ends: 321243 [2023-04-01 22:50:41,050 INFO L226 Difference]: Without dead ends: 242315 [2023-04-01 22:50:41,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 706 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6276 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2448, Invalid=14064, Unknown=0, NotChecked=0, Total=16512 [2023-04-01 22:50:41,142 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 15157 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 31511 mSolverCounterSat, 4422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15157 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 35933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4422 IncrementalHoareTripleChecker+Valid, 31511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:50:41,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15157 Valid, 2616 Invalid, 35933 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4422 Valid, 31511 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2023-04-01 22:50:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242315 states. [2023-04-01 22:50:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242315 to 224203. [2023-04-01 22:50:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224203 states, 219643 states have (on average 1.059464676770942) internal successors, (232704), 220718 states have internal predecessors, (232704), 1108 states have call successors, (1108), 1086 states have call predecessors, (1108), 3451 states have return successors, (28210), 2398 states have call predecessors, (28210), 1107 states have call successors, (28210) [2023-04-01 22:50:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224203 states to 224203 states and 262022 transitions. [2023-04-01 22:50:46,117 INFO L78 Accepts]: Start accepts. Automaton has 224203 states and 262022 transitions. Word has length 349 [2023-04-01 22:50:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:50:46,118 INFO L495 AbstractCegarLoop]: Abstraction has 224203 states and 262022 transitions. [2023-04-01 22:50:46,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 51.0) internal successors, (867), 15 states have internal predecessors, (867), 7 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 22:50:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 224203 states and 262022 transitions. [2023-04-01 22:50:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-04-01 22:50:46,127 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:50:46,128 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:50:46,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 22:50:46,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:46,333 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:50:46,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:50:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash -555737695, now seen corresponding path program 1 times [2023-04-01 22:50:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:50:46,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908679237] [2023-04-01 22:50:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:46,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:50:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:46,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:50:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:46,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:50:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:46,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:50:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:47,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 22:50:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-04-01 22:50:47,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:50:47,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908679237] [2023-04-01 22:50:47,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908679237] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:50:47,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449246912] [2023-04-01 22:50:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:47,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:47,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:50:47,260 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) [2023-04-01 22:50:47,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:50:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:47,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:50:47,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:50:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-04-01 22:50:47,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:50:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-04-01 22:50:48,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449246912] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:50:48,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:50:48,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:50:48,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30058201] [2023-04-01 22:50:48,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:50:48,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:50:48,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:50:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:50:48,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:50:48,302 INFO L87 Difference]: Start difference. First operand 224203 states and 262022 transitions. Second operand has 11 states, 11 states have (on average 67.18181818181819) internal successors, (739), 9 states have internal predecessors, (739), 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) [2023-04-01 22:50:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:50:57,618 INFO L93 Difference]: Finished difference Result 442188 states and 521768 transitions. [2023-04-01 22:50:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 22:50:57,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 67.18181818181819) internal successors, (739), 9 states have internal predecessors, (739), 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 479 [2023-04-01 22:50:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:50:58,442 INFO L225 Difference]: With dead ends: 442188 [2023-04-01 22:50:58,442 INFO L226 Difference]: Without dead ends: 218792 [2023-04-01 22:50:58,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 967 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-04-01 22:50:58,611 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 6789 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 10510 mSolverCounterSat, 1122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6789 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 11632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1122 IncrementalHoareTripleChecker+Valid, 10510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:50:58,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6789 Valid, 792 Invalid, 11632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1122 Valid, 10510 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-04-01 22:50:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218792 states. [2023-04-01 22:51:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218792 to 212676. [2023-04-01 22:51:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212676 states, 208321 states have (on average 1.0517710648470389) internal successors, (219106), 209363 states have internal predecessors, (219106), 1047 states have call successors, (1047), 1030 states have call predecessors, (1047), 3307 states have return successors, (22607), 2282 states have call predecessors, (22607), 1046 states have call successors, (22607) [2023-04-01 22:51:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212676 states to 212676 states and 242760 transitions. [2023-04-01 22:51:02,394 INFO L78 Accepts]: Start accepts. Automaton has 212676 states and 242760 transitions. Word has length 479 [2023-04-01 22:51:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:51:02,394 INFO L495 AbstractCegarLoop]: Abstraction has 212676 states and 242760 transitions. [2023-04-01 22:51:02,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.18181818181819) internal successors, (739), 9 states have internal predecessors, (739), 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) [2023-04-01 22:51:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 212676 states and 242760 transitions. [2023-04-01 22:51:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-04-01 22:51:02,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:51:02,405 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:51:02,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 22:51:02,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:51:02,612 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:51:02,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:51:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1868015224, now seen corresponding path program 1 times [2023-04-01 22:51:02,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:51:02,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221841806] [2023-04-01 22:51:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:51:02,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:51:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:03,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:51:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:03,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:51:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:03,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:51:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:03,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 22:51:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 209 proven. 239 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:51:03,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:51:03,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221841806] [2023-04-01 22:51:03,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221841806] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:51:03,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865046806] [2023-04-01 22:51:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:51:03,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:51:03,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:51:03,976 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) [2023-04-01 22:51:03,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:51:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:51:04,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 22:51:04,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:51:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 22:51:05,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:51:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 95 proven. 356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:51:09,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865046806] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:51:09,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:51:09,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-04-01 22:51:09,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397885906] [2023-04-01 22:51:09,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:51:09,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:51:09,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:51:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:51:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:51:09,139 INFO L87 Difference]: Start difference. First operand 212676 states and 242760 transitions. Second operand has 25 states, 25 states have (on average 46.2) internal successors, (1155), 23 states have internal predecessors, (1155), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 22:52:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:52:06,741 INFO L93 Difference]: Finished difference Result 590157 states and 687595 transitions. [2023-04-01 22:52:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2023-04-01 22:52:06,749 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 46.2) internal successors, (1155), 23 states have internal predecessors, (1155), 8 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 495 [2023-04-01 22:52:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:52:08,011 INFO L225 Difference]: With dead ends: 590157 [2023-04-01 22:52:08,011 INFO L226 Difference]: Without dead ends: 371206 [2023-04-01 22:52:08,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1163 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27365 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=8306, Invalid=53446, Unknown=0, NotChecked=0, Total=61752 [2023-04-01 22:52:08,212 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 54723 mSDsluCounter, 2794 mSDsCounter, 0 mSdLazyCounter, 61492 mSolverCounterSat, 12500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54741 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 73992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 12500 IncrementalHoareTripleChecker+Valid, 61492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:52:08,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54741 Valid, 3081 Invalid, 73992 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [12500 Valid, 61492 Invalid, 0 Unknown, 0 Unchecked, 42.7s Time] [2023-04-01 22:52:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371206 states.