/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_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:36:18,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:36:18,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:36:18,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:36:18,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:36:18,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:36:18,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:36:18,075 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 22:36:18,095 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:36:18,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:36:18,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:36:18,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:36:18,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:36:18,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:36:18,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:36:18,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:36:18,098 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:36:18,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:36:18,098 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:36:18,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:36:18,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:36:18,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:36:18,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:36:18,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:36:18,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:36:18,099 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:36:18,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:36:18,099 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:36:18,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:36:18,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:36:18,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:36:18,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:36:18,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:36:18,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:36:18,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:36:18,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:36:18,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:36:18,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:36:18,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:36:18,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:36:18,101 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:36:18,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:36:18,101 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:36:18,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:36:18,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:36:18,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:36:18,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:36:18,292 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:36:18,292 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:36:18,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label04.c [2023-04-01 22:36:19,258 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:36:19,639 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:36:19,640 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label04.c [2023-04-01 22:36:19,665 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf2f0fa5/2a057b36603e46c7a31a0b1233d0fb91/FLAG79e578799 [2023-04-01 22:36:19,678 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf2f0fa5/2a057b36603e46c7a31a0b1233d0fb91 [2023-04-01 22:36:19,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:36:19,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:36:19,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:36:19,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:36:19,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:36:19,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:19" (1/1) ... [2023-04-01 22:36:19,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ebc0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:19, skipping insertion in model container [2023-04-01 22:36:19,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:36:19" (1/1) ... [2023-04-01 22:36:19,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:36:19,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:36:19,976 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label04.c[2611,2624] [2023-04-01 22:36:20,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:36:20,685 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:36:20,704 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_label04.c[2611,2624] [2023-04-01 22:36:21,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:36:21,051 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:36:21,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21 WrapperNode [2023-04-01 22:36:21,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:36:21,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:36:21,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:36:21,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:36:21,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (1/1) ... [2023-04-01 22:36:21,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (1/1) ... [2023-04-01 22:36:21,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (1/1) ... [2023-04-01 22:36:21,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (1/1) ... [2023-04-01 22:36:21,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (1/1) ... [2023-04-01 22:36:21,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (1/1) ... [2023-04-01 22:36:21,301 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (1/1) ... [2023-04-01 22:36:21,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (1/1) ... [2023-04-01 22:36:21,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:36:21,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:36:21,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:36:21,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:36:21,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (1/1) ... [2023-04-01 22:36:21,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:36:21,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:36:21,367 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 22:36:21,383 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 22:36:21,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:36:21,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:36:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:36:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:36:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:36:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:36:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:36:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:36:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:36:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:36:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:36:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:36:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:36:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:36:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:36:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:36:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:36:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:36:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:36:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:36:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:36:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:36:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:36:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:36:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:36:21,444 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:36:21,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:36:25,094 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:36:25,105 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:36:25,105 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:36:25,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:36:25 BoogieIcfgContainer [2023-04-01 22:36:25,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:36:25,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:36:25,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:36:25,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:36:25,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:36:19" (1/3) ... [2023-04-01 22:36:25,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae6a7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:36:25, skipping insertion in model container [2023-04-01 22:36:25,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:36:21" (2/3) ... [2023-04-01 22:36:25,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae6a7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:36:25, skipping insertion in model container [2023-04-01 22:36:25,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:36:25" (3/3) ... [2023-04-01 22:36:25,112 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label04.c [2023-04-01 22:36:25,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:36:25,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:36:25,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:36:25,171 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;@1ec41904, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:36:25,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:36:25,176 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 22:36:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 22:36:25,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:25,181 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] [2023-04-01 22:36:25,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:25,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1293105999, now seen corresponding path program 1 times [2023-04-01 22:36:25,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:25,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805684427] [2023-04-01 22:36:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:25,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:25,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:25,425 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 22:36:25,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805684427] [2023-04-01 22:36:25,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805684427] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:36:25,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:36:25,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:36:25,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791686841] [2023-04-01 22:36:25,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:36:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:36:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:36:25,449 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 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 22:36:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:30,499 INFO L93 Difference]: Finished difference Result 3230 states and 5909 transitions. [2023-04-01 22:36:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:36:30,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 22 [2023-04-01 22:36:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:30,516 INFO L225 Difference]: With dead ends: 3230 [2023-04-01 22:36:30,517 INFO L226 Difference]: Without dead ends: 2026 [2023-04-01 22:36:30,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:36:30,524 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 3043 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3043 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, 4.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:30,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3043 Valid, 300 Invalid, 5089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-04-01 22:36:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2023-04-01 22:36:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2009. [2023-04-01 22:36:30,608 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 22:36:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3291 transitions. [2023-04-01 22:36:30,616 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3291 transitions. Word has length 22 [2023-04-01 22:36:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:30,617 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 3291 transitions. [2023-04-01 22:36:30,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 22:36:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3291 transitions. [2023-04-01 22:36:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 22:36:30,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:30,620 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:36:30,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:36:30,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:30,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:30,621 INFO L85 PathProgramCache]: Analyzing trace with hash 88548005, now seen corresponding path program 1 times [2023-04-01 22:36:30,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:30,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203997618] [2023-04-01 22:36:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:30,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:30,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:30,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:30,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203997618] [2023-04-01 22:36:30,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203997618] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:36:30,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:36:30,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:36:30,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811476865] [2023-04-01 22:36:30,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:30,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:36:30,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:30,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:36:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:36:30,992 INFO L87 Difference]: Start difference. First operand 2009 states and 3291 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 22:36:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:37,645 INFO L93 Difference]: Finished difference Result 5861 states and 9699 transitions. [2023-04-01 22:36:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:36:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 97 [2023-04-01 22:36:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:37,658 INFO L225 Difference]: With dead ends: 5861 [2023-04-01 22:36:37,658 INFO L226 Difference]: Without dead ends: 3858 [2023-04-01 22:36:37,679 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 22:36:37,684 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 3295 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 7735 mSolverCounterSat, 1186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3295 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 8921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1186 IncrementalHoareTripleChecker+Valid, 7735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:37,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3295 Valid, 815 Invalid, 8921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1186 Valid, 7735 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-04-01 22:36:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2023-04-01 22:36:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3760. [2023-04-01 22:36:37,853 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 22:36:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 5630 transitions. [2023-04-01 22:36:37,880 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 5630 transitions. Word has length 97 [2023-04-01 22:36:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:37,880 INFO L495 AbstractCegarLoop]: Abstraction has 3760 states and 5630 transitions. [2023-04-01 22:36:37,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 22:36:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 5630 transitions. [2023-04-01 22:36:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 22:36:37,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:37,887 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:36:37,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:36:37,888 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:37,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash -471799543, now seen corresponding path program 1 times [2023-04-01 22:36:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:37,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026068719] [2023-04-01 22:36:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:37,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:38,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:38,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:38,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:38,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026068719] [2023-04-01 22:36:38,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026068719] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:36:38,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:36:38,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:36:38,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551238104] [2023-04-01 22:36:38,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:38,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:36:38,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:36:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:36:38,219 INFO L87 Difference]: Start difference. First operand 3760 states and 5630 transitions. Second operand has 8 states, 7 states have (on average 15.0) internal successors, (105), 5 states have internal predecessors, (105), 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 22:36:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:45,762 INFO L93 Difference]: Finished difference Result 14591 states and 22901 transitions. [2023-04-01 22:36:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:36:45,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 5 states have internal predecessors, (105), 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 111 [2023-04-01 22:36:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:45,798 INFO L225 Difference]: With dead ends: 14591 [2023-04-01 22:36:45,798 INFO L226 Difference]: Without dead ends: 10837 [2023-04-01 22:36:45,807 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 22:36:45,810 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 7570 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 7904 mSolverCounterSat, 1988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7570 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 9892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1988 IncrementalHoareTripleChecker+Valid, 7904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:45,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7570 Valid, 955 Invalid, 9892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1988 Valid, 7904 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-04-01 22:36:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10837 states. [2023-04-01 22:36:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 10751. [2023-04-01 22:36:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10751 states, 10420 states have (on average 1.343186180422265) internal successors, (13996), 10488 states have internal predecessors, (13996), 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 22:36:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 15303 transitions. [2023-04-01 22:36:46,002 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 15303 transitions. Word has length 111 [2023-04-01 22:36:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:46,004 INFO L495 AbstractCegarLoop]: Abstraction has 10751 states and 15303 transitions. [2023-04-01 22:36:46,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 5 states have internal predecessors, (105), 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 22:36:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 15303 transitions. [2023-04-01 22:36:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-04-01 22:36:46,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:46,011 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:36:46,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:36:46,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:46,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1897269447, now seen corresponding path program 1 times [2023-04-01 22:36:46,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:46,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489278754] [2023-04-01 22:36:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:46,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:46,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:46,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:46,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-04-01 22:36:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 30 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 22:36:46,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:46,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489278754] [2023-04-01 22:36:46,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489278754] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:36:46,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660279262] [2023-04-01 22:36:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:46,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:36:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:36:46,394 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 22:36:46,425 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 22:36:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:46,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 22:36:46,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:36:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 22:36:46,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:36:46,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660279262] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:36:46,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:36:46,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-04-01 22:36:46,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056317303] [2023-04-01 22:36:46,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:36:46,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:36:46,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:36:46,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:36:46,723 INFO L87 Difference]: Start difference. First operand 10751 states and 15303 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 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 22:36:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:36:50,784 INFO L93 Difference]: Finished difference Result 31816 states and 47933 transitions. [2023-04-01 22:36:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 22:36:50,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 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 216 [2023-04-01 22:36:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:36:50,849 INFO L225 Difference]: With dead ends: 31816 [2023-04-01 22:36:50,849 INFO L226 Difference]: Without dead ends: 21071 [2023-04-01 22:36:50,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:36:50,879 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 3172 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4290 mSolverCounterSat, 1519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3172 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 5809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1519 IncrementalHoareTripleChecker+Valid, 4290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:36:50,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3172 Valid, 679 Invalid, 5809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1519 Valid, 4290 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 22:36:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21071 states. [2023-04-01 22:36:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21071 to 20984. [2023-04-01 22:36:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20984 states, 20324 states have (on average 1.23002361739815) internal successors, (24999), 20478 states have internal predecessors, (24999), 98 states have call successors, (98), 98 states have call predecessors, (98), 561 states have return successors, (3206), 407 states have call predecessors, (3206), 97 states have call successors, (3206) [2023-04-01 22:36:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20984 states to 20984 states and 28303 transitions. [2023-04-01 22:36:51,244 INFO L78 Accepts]: Start accepts. Automaton has 20984 states and 28303 transitions. Word has length 216 [2023-04-01 22:36:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:36:51,245 INFO L495 AbstractCegarLoop]: Abstraction has 20984 states and 28303 transitions. [2023-04-01 22:36:51,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 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 22:36:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 20984 states and 28303 transitions. [2023-04-01 22:36:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-04-01 22:36:51,249 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:36:51,250 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:36:51,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 22:36:51,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:36:51,455 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:36:51,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:36:51,458 INFO L85 PathProgramCache]: Analyzing trace with hash 889153710, now seen corresponding path program 1 times [2023-04-01 22:36:51,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:36:51,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136925428] [2023-04-01 22:36:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:51,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:36:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:51,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:36:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:51,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:36:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:51,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:36:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:36:51,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:36:51,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136925428] [2023-04-01 22:36:51,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136925428] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:36:51,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727938426] [2023-04-01 22:36:51,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:36:51,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:36:51,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:36:51,889 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 22:36:51,914 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 22:36:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:36:52,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 22:36:52,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:36:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-04-01 22:36:52,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:36:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:36:53,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727938426] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:36:53,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:36:53,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2023-04-01 22:36:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276896099] [2023-04-01 22:36:53,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:36:53,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 22:36:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:36:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 22:36:53,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-04-01 22:36:53,012 INFO L87 Difference]: Start difference. First operand 20984 states and 28303 transitions. Second operand has 20 states, 20 states have (on average 31.7) internal successors, (634), 18 states have internal predecessors, (634), 9 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 22:37:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:37:29,012 INFO L93 Difference]: Finished difference Result 160601 states and 278294 transitions. [2023-04-01 22:37:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-04-01 22:37:29,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 31.7) internal successors, (634), 18 states have internal predecessors, (634), 9 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 251 [2023-04-01 22:37:29,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:37:29,853 INFO L225 Difference]: With dead ends: 160601 [2023-04-01 22:37:29,853 INFO L226 Difference]: Without dead ends: 139623 [2023-04-01 22:37:29,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 564 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13568 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4492, Invalid=27370, Unknown=0, NotChecked=0, Total=31862 [2023-04-01 22:37:29,947 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 24015 mSDsluCounter, 2368 mSDsCounter, 0 mSdLazyCounter, 49274 mSolverCounterSat, 10726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24026 SdHoareTripleChecker+Valid, 2719 SdHoareTripleChecker+Invalid, 60000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 10726 IncrementalHoareTripleChecker+Valid, 49274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:37:29,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24026 Valid, 2719 Invalid, 60000 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [10726 Valid, 49274 Invalid, 0 Unknown, 0 Unchecked, 30.7s Time] [2023-04-01 22:37:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139623 states. [2023-04-01 22:37:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139623 to 122152. [2023-04-01 22:37:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122152 states, 119252 states have (on average 1.137884479924865) internal successors, (135695), 119988 states have internal predecessors, (135695), 586 states have call successors, (586), 586 states have call predecessors, (586), 2313 states have return successors, (26731), 1577 states have call predecessors, (26731), 585 states have call successors, (26731) [2023-04-01 22:37:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122152 states to 122152 states and 163012 transitions. [2023-04-01 22:37:33,419 INFO L78 Accepts]: Start accepts. Automaton has 122152 states and 163012 transitions. Word has length 251 [2023-04-01 22:37:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:33,419 INFO L495 AbstractCegarLoop]: Abstraction has 122152 states and 163012 transitions. [2023-04-01 22:37:33,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 31.7) internal successors, (634), 18 states have internal predecessors, (634), 9 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 22:37:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 122152 states and 163012 transitions. [2023-04-01 22:37:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-04-01 22:37:33,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:33,424 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-04-01 22:37:33,439 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 22:37:33,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:33,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:33,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1018387003, now seen corresponding path program 1 times [2023-04-01 22:37:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:33,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172192925] [2023-04-01 22:37:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:34,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:34,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:34,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:37:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:34,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:37:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-04-01 22:37:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:34,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172192925] [2023-04-01 22:37:34,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172192925] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:37:34,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832054186] [2023-04-01 22:37:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:34,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:37:34,117 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 22:37:34,119 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 22:37:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:34,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 22:37:34,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:37:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-04-01 22:37:34,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:37:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832054186] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:37:34,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:37:34,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 22:37:34,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177670250] [2023-04-01 22:37:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:37:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:37:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:34,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:37:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:37:34,529 INFO L87 Difference]: Start difference. First operand 122152 states and 163012 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 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 22:37:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:37:39,980 INFO L93 Difference]: Finished difference Result 244093 states and 328968 transitions. [2023-04-01 22:37:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:37:39,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 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 267 [2023-04-01 22:37:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:37:40,336 INFO L225 Difference]: With dead ends: 244093 [2023-04-01 22:37:40,336 INFO L226 Difference]: Without dead ends: 122750 [2023-04-01 22:37:40,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:37:40,429 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 2469 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 5536 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2469 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 5890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 5536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:37:40,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2469 Valid, 602 Invalid, 5890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 5536 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 22:37:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122750 states. [2023-04-01 22:37:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122750 to 122467. [2023-04-01 22:37:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122467 states, 119439 states have (on average 1.1375765034871357) internal successors, (135871), 120242 states have internal predecessors, (135871), 586 states have call successors, (586), 586 states have call predecessors, (586), 2441 states have return successors, (28589), 1638 states have call predecessors, (28589), 585 states have call successors, (28589) [2023-04-01 22:37:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122467 states to 122467 states and 165046 transitions. [2023-04-01 22:37:43,164 INFO L78 Accepts]: Start accepts. Automaton has 122467 states and 165046 transitions. Word has length 267 [2023-04-01 22:37:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:37:43,164 INFO L495 AbstractCegarLoop]: Abstraction has 122467 states and 165046 transitions. [2023-04-01 22:37:43,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 4 states have internal predecessors, (171), 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 22:37:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 122467 states and 165046 transitions. [2023-04-01 22:37:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-04-01 22:37:43,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:37:43,168 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:37:43,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 22:37:43,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:43,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:37:43,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:37:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash -93986287, now seen corresponding path program 1 times [2023-04-01 22:37:43,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:37:43,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494381071] [2023-04-01 22:37:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:43,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:37:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:43,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:37:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:43,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:37:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:43,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:37:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:43,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-04-01 22:37:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 123 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 22:37:43,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:37:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494381071] [2023-04-01 22:37:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494381071] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:37:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804596999] [2023-04-01 22:37:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:37:43,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:37:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:37:43,970 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 22:37:43,971 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 22:37:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:37:44,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:37:44,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:37:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-04-01 22:37:44,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:37:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 53 proven. 215 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:37:44,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804596999] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:37:44,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:37:44,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-04-01 22:37:44,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785644241] [2023-04-01 22:37:44,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:37:44,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 22:37:44,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:37:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 22:37:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 22:37:44,830 INFO L87 Difference]: Start difference. First operand 122467 states and 165046 transitions. Second operand has 17 states, 17 states have (on average 31.294117647058822) internal successors, (532), 15 states have internal predecessors, (532), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:38:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:38:16,179 INFO L93 Difference]: Finished difference Result 383016 states and 537168 transitions. [2023-04-01 22:38:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-04-01 22:38:16,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 31.294117647058822) internal successors, (532), 15 states have internal predecessors, (532), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 274 [2023-04-01 22:38:16,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:38:17,262 INFO L225 Difference]: With dead ends: 383016 [2023-04-01 22:38:17,263 INFO L226 Difference]: Without dead ends: 258882 [2023-04-01 22:38:17,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 674 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9473 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3167, Invalid=20703, Unknown=0, NotChecked=0, Total=23870 [2023-04-01 22:38:17,489 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 11971 mSDsluCounter, 2693 mSDsCounter, 0 mSdLazyCounter, 39879 mSolverCounterSat, 6738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11971 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 46617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6738 IncrementalHoareTripleChecker+Valid, 39879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:38:17,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11971 Valid, 3041 Invalid, 46617 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6738 Valid, 39879 Invalid, 0 Unknown, 0 Unchecked, 26.5s Time] [2023-04-01 22:38:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258882 states. [2023-04-01 22:38:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258882 to 240599. [2023-04-01 22:38:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240599 states, 235480 states have (on average 1.0978681841345337) internal successors, (258526), 236756 states have internal predecessors, (258526), 1162 states have call successors, (1162), 1162 states have call predecessors, (1162), 3956 states have return successors, (47735), 2680 states have call predecessors, (47735), 1161 states have call successors, (47735) [2023-04-01 22:38:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240599 states to 240599 states and 307423 transitions. [2023-04-01 22:38:22,740 INFO L78 Accepts]: Start accepts. Automaton has 240599 states and 307423 transitions. Word has length 274 [2023-04-01 22:38:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:38:22,740 INFO L495 AbstractCegarLoop]: Abstraction has 240599 states and 307423 transitions. [2023-04-01 22:38:22,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 31.294117647058822) internal successors, (532), 15 states have internal predecessors, (532), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:38:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 240599 states and 307423 transitions. [2023-04-01 22:38:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2023-04-01 22:38:22,756 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:38:22,756 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:38:22,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 22:38:22,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:22,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:38:22,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:38:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1737175845, now seen corresponding path program 1 times [2023-04-01 22:38:22,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:38:22,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924255868] [2023-04-01 22:38:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:22,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:38:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:23,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:38:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:23,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:38:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:23,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:38:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:23,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2023-04-01 22:38:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 175 proven. 142 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:38:23,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:38:23,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924255868] [2023-04-01 22:38:23,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924255868] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:38:23,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655544246] [2023-04-01 22:38:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:38:23,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:38:23,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:38:23,925 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 22:38:23,931 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 22:38:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:38:24,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 22:38:24,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:38:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 22:38:26,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:38:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 50 proven. 270 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:38:29,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655544246] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:38:29,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:38:29,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-04-01 22:38:29,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878363067] [2023-04-01 22:38:29,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:38:29,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 22:38:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:38:29,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 22:38:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-04-01 22:38:29,693 INFO L87 Difference]: Start difference. First operand 240599 states and 307423 transitions. Second operand has 25 states, 25 states have (on average 41.48) internal successors, (1037), 23 states have internal predecessors, (1037), 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 22:39:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:39:46,898 INFO L93 Difference]: Finished difference Result 911524 states and 1216153 transitions. [2023-04-01 22:39:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2023-04-01 22:39:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 41.48) internal successors, (1037), 23 states have internal predecessors, (1037), 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 396 [2023-04-01 22:39:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:39:50,713 INFO L225 Difference]: With dead ends: 911524 [2023-04-01 22:39:50,713 INFO L226 Difference]: Without dead ends: 658496 [2023-04-01 22:39:51,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1301 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39878 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=11033, Invalid=77473, Unknown=0, NotChecked=0, Total=88506 [2023-04-01 22:39:51,151 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 54461 mSDsluCounter, 4162 mSDsCounter, 0 mSdLazyCounter, 88362 mSolverCounterSat, 14218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54485 SdHoareTripleChecker+Valid, 4485 SdHoareTripleChecker+Invalid, 102580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 14218 IncrementalHoareTripleChecker+Valid, 88362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:39:51,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54485 Valid, 4485 Invalid, 102580 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [14218 Valid, 88362 Invalid, 0 Unknown, 0 Unchecked, 55.8s Time] [2023-04-01 22:39:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658496 states. [2023-04-01 22:40:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658496 to 418768. [2023-04-01 22:40:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418768 states, 411335 states have (on average 1.0851860405752003) internal successors, (446375), 412882 states have internal predecessors, (446375), 2042 states have call successors, (2042), 2042 states have call predecessors, (2042), 5390 states have return successors, (76426), 3843 states have call predecessors, (76426), 2041 states have call successors, (76426) [2023-04-01 22:40:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418768 states to 418768 states and 524843 transitions. [2023-04-01 22:40:02,426 INFO L78 Accepts]: Start accepts. Automaton has 418768 states and 524843 transitions. Word has length 396 [2023-04-01 22:40:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:40:02,426 INFO L495 AbstractCegarLoop]: Abstraction has 418768 states and 524843 transitions. [2023-04-01 22:40:02,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 41.48) internal successors, (1037), 23 states have internal predecessors, (1037), 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 22:40:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 418768 states and 524843 transitions. [2023-04-01 22:40:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2023-04-01 22:40:02,433 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:40:02,434 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:40:02,439 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 22:40:02,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:02,639 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:40:02,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:40:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1082945051, now seen corresponding path program 1 times [2023-04-01 22:40:02,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:40:02,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422547553] [2023-04-01 22:40:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:40:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:03,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:40:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:03,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:40:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:03,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:40:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:03,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:40:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:03,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2023-04-01 22:40:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2023-04-01 22:40:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 283 proven. 11 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-04-01 22:40:03,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:40:03,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422547553] [2023-04-01 22:40:03,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422547553] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:40:03,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477404039] [2023-04-01 22:40:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:40:03,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:40:03,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:40:03,433 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 22:40:03,483 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 22:40:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:40:03,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:40:03,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:40:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2023-04-01 22:40:03,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:40:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2023-04-01 22:40:04,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477404039] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:40:04,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:40:04,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2023-04-01 22:40:04,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106326930] [2023-04-01 22:40:04,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:40:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 22:40:04,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:40:04,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 22:40:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:40:04,139 INFO L87 Difference]: Start difference. First operand 418768 states and 524843 transitions. Second operand has 14 states, 14 states have (on average 39.92857142857143) internal successors, (559), 12 states have internal predecessors, (559), 5 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 22:40:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:40:18,001 INFO L93 Difference]: Finished difference Result 873498 states and 1092199 transitions. [2023-04-01 22:40:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 22:40:18,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 39.92857142857143) internal successors, (559), 12 states have internal predecessors, (559), 5 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 603 [2023-04-01 22:40:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:40:19,479 INFO L225 Difference]: With dead ends: 873498 [2023-04-01 22:40:19,479 INFO L226 Difference]: Without dead ends: 487694 [2023-04-01 22:40:19,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1246 GetRequests, 1221 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:40:19,860 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 6458 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 19202 mSolverCounterSat, 1340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6458 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 20542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1340 IncrementalHoareTripleChecker+Valid, 19202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:40:19,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6458 Valid, 1033 Invalid, 20542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1340 Valid, 19202 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-04-01 22:40:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487694 states.