/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem15_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:32:49,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:32:49,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:32:49,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:32:49,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:32:49,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:32:49,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:32:49,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:32:49,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:32:49,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:32:49,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:32:49,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:32:49,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:32:49,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:32:49,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:32:49,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:32:49,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:32:49,881 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:32:49,909 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:32:49,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:32:49,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:32:49,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:32:49,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:32:49,911 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:32:49,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:32:49,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:32:49,912 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:32:49,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:32:49,913 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:32:49,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:32:49,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:32:49,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:32:49,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:32:49,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:32:49,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:32:49,914 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:32:49,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:32:49,914 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:32:49,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:32:49,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:32:49,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:32:49,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:32:49,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:32:49,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:32:49,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:32:49,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:32:49,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:32:49,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:32:49,916 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:32:49,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:32:49,916 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:32:49,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:32:49,917 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:32:49,917 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:32:50,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:32:50,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:32:50,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:32:50,173 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:32:50,173 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:32:50,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label35.c [2023-03-30 23:32:51,341 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:32:51,683 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:32:51,684 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label35.c [2023-03-30 23:32:51,702 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dda0ec51/e4cc7450a9774fe19e20f4d12369f02d/FLAGf0ff1e1f2 [2023-03-30 23:32:51,718 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dda0ec51/e4cc7450a9774fe19e20f4d12369f02d [2023-03-30 23:32:51,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:32:51,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:32:51,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:32:51,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:32:51,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:32:51,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:32:51" (1/1) ... [2023-03-30 23:32:51,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c6bc01c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:51, skipping insertion in model container [2023-03-30 23:32:51,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:32:51" (1/1) ... [2023-03-30 23:32:51,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:32:51,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:32:51,998 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label35.c[4490,4503] [2023-03-30 23:32:52,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:32:52,388 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:32:52,417 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label35.c[4490,4503] [2023-03-30 23:32:52,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:32:52,632 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:32:52,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52 WrapperNode [2023-03-30 23:32:52,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:32:52,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:32:52,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:32:52,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:32:52,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (1/1) ... [2023-03-30 23:32:52,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (1/1) ... [2023-03-30 23:32:52,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (1/1) ... [2023-03-30 23:32:52,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (1/1) ... [2023-03-30 23:32:52,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (1/1) ... [2023-03-30 23:32:52,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (1/1) ... [2023-03-30 23:32:52,781 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (1/1) ... [2023-03-30 23:32:52,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (1/1) ... [2023-03-30 23:32:52,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:32:52,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:32:52,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:32:52,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:32:52,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (1/1) ... [2023-03-30 23:32:52,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:32:52,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:52,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:32:52,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:32:52,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:32:52,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:32:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:32:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:32:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:32:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:32:52,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:32:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:32:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:32:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:32:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:32:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:32:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:32:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:32:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:32:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:32:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:32:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:32:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:32:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:32:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:32:53,048 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:32:53,050 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:32:55,425 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:32:55,439 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:32:55,440 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:32:55,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:32:55 BoogieIcfgContainer [2023-03-30 23:32:55,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:32:55,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:32:55,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:32:55,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:32:55,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:32:51" (1/3) ... [2023-03-30 23:32:55,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1745fbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:32:55, skipping insertion in model container [2023-03-30 23:32:55,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:32:52" (2/3) ... [2023-03-30 23:32:55,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1745fbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:32:55, skipping insertion in model container [2023-03-30 23:32:55,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:32:55" (3/3) ... [2023-03-30 23:32:55,452 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label35.c [2023-03-30 23:32:55,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:32:55,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:32:55,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:32:55,549 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;@6c386623, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:32:55,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:32:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 23:32:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-30 23:32:55,566 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:55,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:32:55,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:55,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1404900033, now seen corresponding path program 1 times [2023-03-30 23:32:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:55,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31444574] [2023-03-30 23:32:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:55,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:56,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:32:56,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:56,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31444574] [2023-03-30 23:32:56,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31444574] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:32:56,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:32:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:32:56,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49870358] [2023-03-30 23:32:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:32:56,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:32:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:32:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:32:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:32:56,150 INFO L87 Difference]: Start difference. First operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:32:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:32:59,458 INFO L93 Difference]: Finished difference Result 1245 states and 2225 transitions. [2023-03-30 23:32:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:32:59,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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 42 [2023-03-30 23:32:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:32:59,476 INFO L225 Difference]: With dead ends: 1245 [2023-03-30 23:32:59,477 INFO L226 Difference]: Without dead ends: 729 [2023-03-30 23:32:59,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:32:59,490 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 1168 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:32:59,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 87 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-30 23:32:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-03-30 23:32:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 712. [2023-03-30 23:32:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 697 states have (on average 1.7044476327116211) internal successors, (1188), 699 states have internal predecessors, (1188), 6 states have call successors, (6), 6 states have call predecessors, (6), 8 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-03-30 23:32:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1206 transitions. [2023-03-30 23:32:59,572 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1206 transitions. Word has length 42 [2023-03-30 23:32:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:32:59,572 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 1206 transitions. [2023-03-30 23:32:59,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:32:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1206 transitions. [2023-03-30 23:32:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-03-30 23:32:59,577 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:32:59,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:32:59,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:32:59,577 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:32:59,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:32:59,578 INFO L85 PathProgramCache]: Analyzing trace with hash 782459506, now seen corresponding path program 1 times [2023-03-30 23:32:59,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:32:59,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809131354] [2023-03-30 23:32:59,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:59,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:32:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:59,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:32:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:59,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:32:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:32:59,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:32:59,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809131354] [2023-03-30 23:32:59,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809131354] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:32:59,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237396218] [2023-03-30 23:32:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:32:59,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:32:59,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:32:59,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:32:59,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:32:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:32:59,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:32:59,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:33:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:33:00,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:33:00,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237396218] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:33:00,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:33:00,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:33:00,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391152618] [2023-03-30 23:33:00,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:33:00,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:33:00,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:00,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:33:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:33:00,066 INFO L87 Difference]: Start difference. First operand 712 states and 1206 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:33:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:01,754 INFO L93 Difference]: Finished difference Result 2043 states and 3512 transitions. [2023-03-30 23:33:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:33:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2023-03-30 23:33:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:01,761 INFO L225 Difference]: With dead ends: 2043 [2023-03-30 23:33:01,761 INFO L226 Difference]: Without dead ends: 1337 [2023-03-30 23:33:01,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:33:01,765 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 300 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:01,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 339 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:33:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2023-03-30 23:33:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1334. [2023-03-30 23:33:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1309 states have (on average 1.4576012223071046) internal successors, (1908), 1312 states have internal predecessors, (1908), 10 states have call successors, (10), 10 states have call predecessors, (10), 14 states have return successors, (29), 11 states have call predecessors, (29), 9 states have call successors, (29) [2023-03-30 23:33:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1947 transitions. [2023-03-30 23:33:01,810 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1947 transitions. Word has length 111 [2023-03-30 23:33:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:01,811 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1947 transitions. [2023-03-30 23:33:01,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:33:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1947 transitions. [2023-03-30 23:33:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-03-30 23:33:01,815 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:01,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:33:01,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:33:02,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:02,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:02,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2003757934, now seen corresponding path program 1 times [2023-03-30 23:33:02,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:02,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962298365] [2023-03-30 23:33:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:02,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:02,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:33:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:02,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:33:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:33:02,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:33:02,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962298365] [2023-03-30 23:33:02,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962298365] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:33:02,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:33:02,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:33:02,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448380071] [2023-03-30 23:33:02,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:33:02,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:33:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:02,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:33:02,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:33:02,393 INFO L87 Difference]: Start difference. First operand 1334 states and 1947 transitions. Second operand has 7 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:33:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:05,709 INFO L93 Difference]: Finished difference Result 3990 states and 5919 transitions. [2023-03-30 23:33:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:33:05,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 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 128 [2023-03-30 23:33:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:05,722 INFO L225 Difference]: With dead ends: 3990 [2023-03-30 23:33:05,723 INFO L226 Difference]: Without dead ends: 2662 [2023-03-30 23:33:05,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:33:05,727 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1754 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:05,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 166 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 1890 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-30 23:33:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2023-03-30 23:33:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2311. [2023-03-30 23:33:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2251 states have (on average 1.3198578409595736) internal successors, (2971), 2270 states have internal predecessors, (2971), 16 states have call successors, (16), 16 states have call predecessors, (16), 43 states have return successors, (96), 24 states have call predecessors, (96), 15 states have call successors, (96) [2023-03-30 23:33:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3083 transitions. [2023-03-30 23:33:05,805 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3083 transitions. Word has length 128 [2023-03-30 23:33:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:05,805 INFO L495 AbstractCegarLoop]: Abstraction has 2311 states and 3083 transitions. [2023-03-30 23:33:05,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:33:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3083 transitions. [2023-03-30 23:33:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-03-30 23:33:05,810 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:05,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:33:05,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:33:05,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:05,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash -368349107, now seen corresponding path program 1 times [2023-03-30 23:33:05,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:05,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518775992] [2023-03-30 23:33:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:05,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:06,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:33:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:06,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:33:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:33:06,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:33:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518775992] [2023-03-30 23:33:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518775992] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:33:06,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018675411] [2023-03-30 23:33:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:06,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:06,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:33:06,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:33:06,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:33:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:06,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:33:06,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:33:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:33:06,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:33:06,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018675411] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:33:06,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:33:06,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:33:06,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704073368] [2023-03-30 23:33:06,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:33:06,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:33:06,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:33:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:33:06,742 INFO L87 Difference]: Start difference. First operand 2311 states and 3083 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:33:08,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:08,534 INFO L93 Difference]: Finished difference Result 5871 states and 8121 transitions. [2023-03-30 23:33:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:33:08,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 316 [2023-03-30 23:33:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:08,550 INFO L225 Difference]: With dead ends: 5871 [2023-03-30 23:33:08,550 INFO L226 Difference]: Without dead ends: 3566 [2023-03-30 23:33:08,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:33:08,556 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 300 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:08,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 372 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:33:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2023-03-30 23:33:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3562. [2023-03-30 23:33:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3476 states have (on average 1.273590333716916) internal successors, (4427), 3502 states have internal predecessors, (4427), 24 states have call successors, (24), 24 states have call predecessors, (24), 61 states have return successors, (183), 35 states have call predecessors, (183), 23 states have call successors, (183) [2023-03-30 23:33:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 4634 transitions. [2023-03-30 23:33:08,672 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 4634 transitions. Word has length 316 [2023-03-30 23:33:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:08,675 INFO L495 AbstractCegarLoop]: Abstraction has 3562 states and 4634 transitions. [2023-03-30 23:33:08,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:33:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 4634 transitions. [2023-03-30 23:33:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2023-03-30 23:33:08,690 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:08,690 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-03-30 23:33:08,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:33:08,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:33:08,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:08,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash 626951307, now seen corresponding path program 1 times [2023-03-30 23:33:08,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:08,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290461117] [2023-03-30 23:33:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:08,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:09,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:33:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:09,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:33:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:09,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-30 23:33:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:09,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2023-03-30 23:33:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 270 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-03-30 23:33:09,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:33:09,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290461117] [2023-03-30 23:33:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290461117] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:33:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777547621] [2023-03-30 23:33:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:09,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:09,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:33:09,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:33:09,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:33:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:09,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:33:09,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:33:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-03-30 23:33:09,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:33:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-03-30 23:33:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777547621] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:33:10,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:33:10,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:33:10,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34461852] [2023-03-30 23:33:10,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:33:10,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:33:10,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:33:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:33:10,156 INFO L87 Difference]: Start difference. First operand 3562 states and 4634 transitions. Second operand has 12 states, 12 states have (on average 41.333333333333336) internal successors, (496), 10 states have internal predecessors, (496), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:33:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:16,222 INFO L93 Difference]: Finished difference Result 10780 states and 15780 transitions. [2023-03-30 23:33:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-30 23:33:16,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 41.333333333333336) internal successors, (496), 10 states have internal predecessors, (496), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 408 [2023-03-30 23:33:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:16,262 INFO L225 Difference]: With dead ends: 10780 [2023-03-30 23:33:16,262 INFO L226 Difference]: Without dead ends: 7224 [2023-03-30 23:33:16,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 831 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-03-30 23:33:16,275 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 2800 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 7206 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 8103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 7206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:16,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2802 Valid, 413 Invalid, 8103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [897 Valid, 7206 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-03-30 23:33:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7224 states. [2023-03-30 23:33:16,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7224 to 7155. [2023-03-30 23:33:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 6944 states have (on average 1.181163594470046) internal successors, (8202), 7029 states have internal predecessors, (8202), 66 states have call successors, (66), 46 states have call predecessors, (66), 144 states have return successors, (921), 79 states have call predecessors, (921), 65 states have call successors, (921) [2023-03-30 23:33:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 9189 transitions. [2023-03-30 23:33:16,523 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 9189 transitions. Word has length 408 [2023-03-30 23:33:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:16,524 INFO L495 AbstractCegarLoop]: Abstraction has 7155 states and 9189 transitions. [2023-03-30 23:33:16,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 41.333333333333336) internal successors, (496), 10 states have internal predecessors, (496), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:33:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 9189 transitions. [2023-03-30 23:33:16,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2023-03-30 23:33:16,534 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:16,535 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-03-30 23:33:16,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:33:16,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:16,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:16,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:16,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1356776345, now seen corresponding path program 1 times [2023-03-30 23:33:16,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:16,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889471853] [2023-03-30 23:33:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:17,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:33:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:17,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:33:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:17,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-30 23:33:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:17,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2023-03-30 23:33:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-03-30 23:33:17,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:33:17,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889471853] [2023-03-30 23:33:17,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889471853] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:33:17,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518826720] [2023-03-30 23:33:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:17,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:17,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:33:17,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:33:17,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:33:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:17,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:33:17,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:33:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-03-30 23:33:17,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:33:17,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518826720] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:33:17,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:33:17,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:33:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224373268] [2023-03-30 23:33:17,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:33:17,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:33:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:17,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:33:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:33:17,481 INFO L87 Difference]: Start difference. First operand 7155 states and 9189 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:33:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:19,053 INFO L93 Difference]: Finished difference Result 14299 states and 18425 transitions. [2023-03-30 23:33:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:33:19,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 410 [2023-03-30 23:33:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:19,087 INFO L225 Difference]: With dead ends: 14299 [2023-03-30 23:33:19,087 INFO L226 Difference]: Without dead ends: 7154 [2023-03-30 23:33:19,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:33:19,109 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 341 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:19,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 223 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-30 23:33:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2023-03-30 23:33:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 7154. [2023-03-30 23:33:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 6943 states have (on average 1.1487829468529454) internal successors, (7976), 7028 states have internal predecessors, (7976), 66 states have call successors, (66), 46 states have call predecessors, (66), 144 states have return successors, (801), 79 states have call predecessors, (801), 65 states have call successors, (801) [2023-03-30 23:33:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 8843 transitions. [2023-03-30 23:33:19,343 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 8843 transitions. Word has length 410 [2023-03-30 23:33:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:19,343 INFO L495 AbstractCegarLoop]: Abstraction has 7154 states and 8843 transitions. [2023-03-30 23:33:19,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:33:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 8843 transitions. [2023-03-30 23:33:19,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-03-30 23:33:19,351 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:19,351 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:33:19,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:33:19,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:19,557 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:19,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:19,558 INFO L85 PathProgramCache]: Analyzing trace with hash 760765820, now seen corresponding path program 1 times [2023-03-30 23:33:19,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:19,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498644434] [2023-03-30 23:33:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:19,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:19,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:33:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:19,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:33:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:19,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-30 23:33:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:19,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2023-03-30 23:33:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-03-30 23:33:20,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:33:20,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498644434] [2023-03-30 23:33:20,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498644434] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:33:20,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395548637] [2023-03-30 23:33:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:20,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:20,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:33:20,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:33:20,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:33:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:20,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:33:20,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:33:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-03-30 23:33:20,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:33:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395548637] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:33:20,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:33:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:33:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009051688] [2023-03-30 23:33:20,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:33:20,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:33:20,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:33:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:33:20,324 INFO L87 Difference]: Start difference. First operand 7154 states and 8843 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:33:21,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:21,904 INFO L93 Difference]: Finished difference Result 20899 states and 26411 transitions. [2023-03-30 23:33:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:33:21,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 454 [2023-03-30 23:33:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:21,942 INFO L225 Difference]: With dead ends: 20899 [2023-03-30 23:33:21,942 INFO L226 Difference]: Without dead ends: 10596 [2023-03-30 23:33:21,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:33:21,972 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 289 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:21,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 677 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-30 23:33:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10596 states. [2023-03-30 23:33:22,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10596 to 10285. [2023-03-30 23:33:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10285 states, 10009 states have (on average 1.0852232990308721) internal successors, (10862), 10115 states have internal predecessors, (10862), 95 states have call successors, (95), 66 states have call predecessors, (95), 180 states have return successors, (1132), 103 states have call predecessors, (1132), 94 states have call successors, (1132) [2023-03-30 23:33:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10285 states to 10285 states and 12089 transitions. [2023-03-30 23:33:22,248 INFO L78 Accepts]: Start accepts. Automaton has 10285 states and 12089 transitions. Word has length 454 [2023-03-30 23:33:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:22,248 INFO L495 AbstractCegarLoop]: Abstraction has 10285 states and 12089 transitions. [2023-03-30 23:33:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:33:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 10285 states and 12089 transitions. [2023-03-30 23:33:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2023-03-30 23:33:22,256 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:22,256 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:33:22,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:33:22,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:22,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:22,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:22,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1707629871, now seen corresponding path program 1 times [2023-03-30 23:33:22,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:22,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396136117] [2023-03-30 23:33:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:22,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:22,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:33:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:22,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:33:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:22,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-30 23:33:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:22,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-03-30 23:33:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 327 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-03-30 23:33:22,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:33:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396136117] [2023-03-30 23:33:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396136117] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:33:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880978637] [2023-03-30 23:33:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:22,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:22,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:33:22,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:33:23,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:33:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:23,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:33:23,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:33:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-03-30 23:33:23,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:33:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-03-30 23:33:23,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880978637] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:33:23,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:33:23,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:33:23,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631214192] [2023-03-30 23:33:23,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:33:23,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:33:23,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:33:23,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:33:23,688 INFO L87 Difference]: Start difference. First operand 10285 states and 12089 transitions. Second operand has 11 states, 11 states have (on average 51.72727272727273) internal successors, (569), 9 states have internal predecessors, (569), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:33:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:27,287 INFO L93 Difference]: Finished difference Result 20987 states and 24846 transitions. [2023-03-30 23:33:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-30 23:33:27,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 51.72727272727273) internal successors, (569), 9 states have internal predecessors, (569), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 465 [2023-03-30 23:33:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:27,329 INFO L225 Difference]: With dead ends: 20987 [2023-03-30 23:33:27,329 INFO L226 Difference]: Without dead ends: 10712 [2023-03-30 23:33:27,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 946 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-03-30 23:33:27,356 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1867 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 4496 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 4876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 4496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:27,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1876 Valid, 271 Invalid, 4876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 4496 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:33:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10712 states. [2023-03-30 23:33:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10712 to 9068. [2023-03-30 23:33:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9068 states, 8799 states have (on average 1.07830435276736) internal successors, (9488), 8920 states have internal predecessors, (9488), 83 states have call successors, (83), 58 states have call predecessors, (83), 185 states have return successors, (900), 89 states have call predecessors, (900), 82 states have call successors, (900) [2023-03-30 23:33:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9068 states to 9068 states and 10471 transitions. [2023-03-30 23:33:27,650 INFO L78 Accepts]: Start accepts. Automaton has 9068 states and 10471 transitions. Word has length 465 [2023-03-30 23:33:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:27,651 INFO L495 AbstractCegarLoop]: Abstraction has 9068 states and 10471 transitions. [2023-03-30 23:33:27,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 51.72727272727273) internal successors, (569), 9 states have internal predecessors, (569), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:33:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 9068 states and 10471 transitions. [2023-03-30 23:33:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-03-30 23:33:27,662 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:27,662 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:33:27,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 23:33:27,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:27,869 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:27,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:27,870 INFO L85 PathProgramCache]: Analyzing trace with hash -763782436, now seen corresponding path program 1 times [2023-03-30 23:33:27,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:27,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100289228] [2023-03-30 23:33:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:27,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:28,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:33:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:28,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:33:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:28,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-30 23:33:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:28,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-03-30 23:33:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-03-30 23:33:28,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:33:28,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100289228] [2023-03-30 23:33:28,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100289228] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:33:28,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:33:28,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-30 23:33:28,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174586920] [2023-03-30 23:33:28,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:33:28,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:33:28,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:28,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:33:28,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:33:28,315 INFO L87 Difference]: Start difference. First operand 9068 states and 10471 transitions. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 3 states have internal predecessors, (242), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:33:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:30,115 INFO L93 Difference]: Finished difference Result 18437 states and 21263 transitions. [2023-03-30 23:33:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:33:30,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 3 states have internal predecessors, (242), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 481 [2023-03-30 23:33:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:30,152 INFO L225 Difference]: With dead ends: 18437 [2023-03-30 23:33:30,152 INFO L226 Difference]: Without dead ends: 9379 [2023-03-30 23:33:30,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:33:30,170 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1118 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:30,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 82 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:33:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2023-03-30 23:33:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 9061. [2023-03-30 23:33:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9061 states, 8794 states have (on average 1.0780077325449169) internal successors, (9480), 8913 states have internal predecessors, (9480), 83 states have call successors, (83), 58 states have call predecessors, (83), 183 states have return successors, (890), 89 states have call predecessors, (890), 82 states have call successors, (890) [2023-03-30 23:33:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9061 states to 9061 states and 10453 transitions. [2023-03-30 23:33:30,352 INFO L78 Accepts]: Start accepts. Automaton has 9061 states and 10453 transitions. Word has length 481 [2023-03-30 23:33:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:30,353 INFO L495 AbstractCegarLoop]: Abstraction has 9061 states and 10453 transitions. [2023-03-30 23:33:30,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 3 states have internal predecessors, (242), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:33:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 9061 states and 10453 transitions. [2023-03-30 23:33:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-03-30 23:33:30,364 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:30,364 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:33:30,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-30 23:33:30,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:30,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash -910255942, now seen corresponding path program 1 times [2023-03-30 23:33:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:30,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069737006] [2023-03-30 23:33:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:30,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:30,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:33:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:30,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:33:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:30,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-30 23:33:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:30,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2023-03-30 23:33:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-03-30 23:33:30,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:33:30,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069737006] [2023-03-30 23:33:30,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069737006] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:33:30,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:33:30,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:33:30,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099943888] [2023-03-30 23:33:30,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:33:30,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:33:30,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:33:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:33:30,922 INFO L87 Difference]: Start difference. First operand 9061 states and 10453 transitions. Second operand has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 4 states have internal predecessors, (248), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 23:33:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:33,734 INFO L93 Difference]: Finished difference Result 26929 states and 31487 transitions. [2023-03-30 23:33:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:33:33,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 4 states have internal predecessors, (248), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 530 [2023-03-30 23:33:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:33,795 INFO L225 Difference]: With dead ends: 26929 [2023-03-30 23:33:33,795 INFO L226 Difference]: Without dead ends: 17878 [2023-03-30 23:33:33,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:33:33,817 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1400 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:33,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 148 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-30 23:33:33,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17878 states. [2023-03-30 23:33:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17878 to 15674. [2023-03-30 23:33:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15674 states, 15259 states have (on average 1.07058129628416) internal successors, (16336), 15422 states have internal predecessors, (16336), 144 states have call successors, (144), 100 states have call predecessors, (144), 270 states have return successors, (1734), 151 states have call predecessors, (1734), 143 states have call successors, (1734) [2023-03-30 23:33:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15674 states to 15674 states and 18214 transitions. [2023-03-30 23:33:34,267 INFO L78 Accepts]: Start accepts. Automaton has 15674 states and 18214 transitions. Word has length 530 [2023-03-30 23:33:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:34,267 INFO L495 AbstractCegarLoop]: Abstraction has 15674 states and 18214 transitions. [2023-03-30 23:33:34,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 4 states have internal predecessors, (248), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 23:33:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 15674 states and 18214 transitions. [2023-03-30 23:33:34,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2023-03-30 23:33:34,288 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:34,289 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:33:34,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-30 23:33:34,289 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:34,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1184327323, now seen corresponding path program 1 times [2023-03-30 23:33:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:34,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559640419] [2023-03-30 23:33:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:34,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:34,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:33:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:34,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:33:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:34,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-03-30 23:33:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:34,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-03-30 23:33:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:34,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 447 [2023-03-30 23:33:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 145 proven. 4 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2023-03-30 23:33:34,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:33:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559640419] [2023-03-30 23:33:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559640419] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:33:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769593050] [2023-03-30 23:33:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:34,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:34,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:33:34,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:33:34,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 23:33:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:33:35,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 23:33:35,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:33:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 479 proven. 2 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-03-30 23:33:35,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:33:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 479 proven. 2 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-03-30 23:33:35,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769593050] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:33:35,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:33:35,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-03-30 23:33:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024508663] [2023-03-30 23:33:35,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:33:35,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 23:33:35,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:33:35,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 23:33:35,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:33:35,785 INFO L87 Difference]: Start difference. First operand 15674 states and 18214 transitions. Second operand has 13 states, 13 states have (on average 39.07692307692308) internal successors, (508), 11 states have internal predecessors, (508), 5 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:33:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:33:41,571 INFO L93 Difference]: Finished difference Result 47832 states and 57804 transitions. [2023-03-30 23:33:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-30 23:33:41,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 39.07692307692308) internal successors, (508), 11 states have internal predecessors, (508), 5 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 593 [2023-03-30 23:33:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:33:41,660 INFO L225 Difference]: With dead ends: 47832 [2023-03-30 23:33:41,661 INFO L226 Difference]: Without dead ends: 24250 [2023-03-30 23:33:41,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1225 GetRequests, 1200 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2023-03-30 23:33:41,713 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 3845 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 6586 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3852 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 7583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 6586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:33:41,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3852 Valid, 325 Invalid, 7583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 6586 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-03-30 23:33:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24250 states. [2023-03-30 23:33:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24250 to 22780. [2023-03-30 23:33:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22780 states, 22264 states have (on average 1.0351239669421488) internal successors, (23046), 22418 states have internal predecessors, (23046), 211 states have call successors, (211), 146 states have call predecessors, (211), 304 states have return successors, (1506), 215 states have call predecessors, (1506), 210 states have call successors, (1506) [2023-03-30 23:33:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22780 states to 22780 states and 24763 transitions. [2023-03-30 23:33:42,314 INFO L78 Accepts]: Start accepts. Automaton has 22780 states and 24763 transitions. Word has length 593 [2023-03-30 23:33:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:33:42,315 INFO L495 AbstractCegarLoop]: Abstraction has 22780 states and 24763 transitions. [2023-03-30 23:33:42,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 39.07692307692308) internal successors, (508), 11 states have internal predecessors, (508), 5 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:33:42,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22780 states and 24763 transitions. [2023-03-30 23:33:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2023-03-30 23:33:42,336 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:33:42,337 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:33:42,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 23:33:42,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:33:42,543 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:33:42,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:33:42,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1773572458, now seen corresponding path program 1 times [2023-03-30 23:33:42,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:33:42,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464764417] [2023-03-30 23:33:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:33:42,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:33:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat