/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/nla-digbench-scaling/lcm2_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:41:42,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:41:42,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:41:42,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:41:42,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:41:42,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:41:42,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:41:42,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:41:42,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:41:42,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:41:42,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:41:42,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:41:42,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:41:42,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:41:42,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:41:42,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:41:42,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 00:41:42,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:41:42,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:41:42,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:41:42,296 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 [2023-03-31 00:41:42,330 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:41:42,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:41:42,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:41:42,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:41:42,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:41:42,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:41:42,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:41:42,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:41:42,333 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:41:42,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:41:42,334 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:41:42,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:41:42,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:41:42,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:41:42,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:41:42,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:41:42,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:41:42,335 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:41:42,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:41:42,335 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:41:42,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:41:42,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:41:42,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:41:42,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:41:42,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:41:42,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:41:42,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:41:42,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:41:42,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:41:42,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:41:42,337 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:41:42,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:41:42,337 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:41:42,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:41:42,337 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:41:42,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:41:42,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:41:42,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:41:42,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:41:42,591 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:41:42,591 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:41:42,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound10.c [2023-03-31 00:41:43,632 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:41:43,818 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:41:43,819 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound10.c [2023-03-31 00:41:43,823 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d2deb7b/017a07bb1c9341f89f359e4e54f3a24b/FLAG679ea5931 [2023-03-31 00:41:43,841 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d2deb7b/017a07bb1c9341f89f359e4e54f3a24b [2023-03-31 00:41:43,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:41:43,845 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:41:43,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:41:43,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:41:43,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:41:43,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:41:43" (1/1) ... [2023-03-31 00:41:43,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2f7709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:43, skipping insertion in model container [2023-03-31 00:41:43,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:41:43" (1/1) ... [2023-03-31 00:41:43,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:41:43,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:41:44,035 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/nla-digbench-scaling/lcm2_unwindbound10.c[537,550] [2023-03-31 00:41:44,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:41:44,067 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:41:44,082 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/nla-digbench-scaling/lcm2_unwindbound10.c[537,550] [2023-03-31 00:41:44,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:41:44,109 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:41:44,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44 WrapperNode [2023-03-31 00:41:44,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:41:44,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:41:44,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:41:44,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:41:44,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (1/1) ... [2023-03-31 00:41:44,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (1/1) ... [2023-03-31 00:41:44,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (1/1) ... [2023-03-31 00:41:44,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (1/1) ... [2023-03-31 00:41:44,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (1/1) ... [2023-03-31 00:41:44,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (1/1) ... [2023-03-31 00:41:44,147 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (1/1) ... [2023-03-31 00:41:44,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (1/1) ... [2023-03-31 00:41:44,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:41:44,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:41:44,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:41:44,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:41:44,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (1/1) ... [2023-03-31 00:41:44,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:41:44,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:41:44,178 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) [2023-03-31 00:41:44,180 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 [2023-03-31 00:41:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:41:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:41:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:41:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:41:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:41:44,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:41:44,211 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:41:44,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:41:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:41:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:41:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 00:41:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:41:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:41:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:41:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:41:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:41:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:41:44,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:41:44,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:41:44,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:41:44,266 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:41:44,268 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:41:44,393 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:41:44,397 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:41:44,397 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 00:41:44,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:41:44 BoogieIcfgContainer [2023-03-31 00:41:44,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:41:44,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:41:44,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:41:44,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:41:44,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:41:43" (1/3) ... [2023-03-31 00:41:44,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63adbcf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:41:44, skipping insertion in model container [2023-03-31 00:41:44,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:41:44" (2/3) ... [2023-03-31 00:41:44,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63adbcf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:41:44, skipping insertion in model container [2023-03-31 00:41:44,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:41:44" (3/3) ... [2023-03-31 00:41:44,405 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound10.c [2023-03-31 00:41:44,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:41:44,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:41:44,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:41:44,487 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;@748fc7e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:41:44,487 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:41:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:41:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 00:41:44,496 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:41:44,497 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:41:44,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:41:44,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:41:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2023-03-31 00:41:44,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:41:44,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98716745] [2023-03-31 00:41:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:44,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:41:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:41:44,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:41:44,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98716745] [2023-03-31 00:41:44,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:41:44,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308010701] [2023-03-31 00:41:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:44,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:41:44,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:41:44,641 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) [2023-03-31 00:41:44,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:41:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:41:44,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 00:41:44,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:41:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 00:41:44,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:41:44,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308010701] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:41:44,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:41:44,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 00:41:44,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156678161] [2023-03-31 00:41:44,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:41:44,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 00:41:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:41:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 00:41:44,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:41:44,862 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:41:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:41:44,898 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2023-03-31 00:41:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 00:41:44,900 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-03-31 00:41:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:41:44,905 INFO L225 Difference]: With dead ends: 57 [2023-03-31 00:41:44,905 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 00:41:44,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:41:44,910 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:41:44,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:41:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 00:41:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-31 00:41:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:41:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-03-31 00:41:44,938 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2023-03-31 00:41:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:41:44,938 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-03-31 00:41:44,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:41:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-03-31 00:41:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 00:41:44,940 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:41:44,940 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:41:44,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 00:41:45,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 00:41:45,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:41:45,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:41:45,147 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2023-03-31 00:41:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:41:45,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394149254] [2023-03-31 00:41:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:41:45,197 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:41:45,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930866029] [2023-03-31 00:41:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:45,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:41:45,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:41:45,205 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) [2023-03-31 00:41:45,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:41:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:41:45,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:41:45,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:41:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:41:45,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:41:45,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:41:45,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394149254] [2023-03-31 00:41:45,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:41:45,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930866029] [2023-03-31 00:41:45,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930866029] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:41:45,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:41:45,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:41:45,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283985488] [2023-03-31 00:41:45,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:41:45,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:41:45,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:41:45,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:41:45,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:41:45,374 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:41:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:41:45,388 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2023-03-31 00:41:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:41:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2023-03-31 00:41:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:41:45,393 INFO L225 Difference]: With dead ends: 36 [2023-03-31 00:41:45,393 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 00:41:45,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:41:45,396 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:41:45,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:41:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 00:41:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-31 00:41:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:41:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-03-31 00:41:45,405 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 33 [2023-03-31 00:41:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:41:45,407 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-03-31 00:41:45,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:41:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-03-31 00:41:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 00:41:45,408 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:41:45,408 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:41:45,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 00:41:45,615 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,SelfDestructingSolverStorable1 [2023-03-31 00:41:45,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:41:45,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:41:45,617 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 1 times [2023-03-31 00:41:45,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:41:45,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496727097] [2023-03-31 00:41:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:45,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:41:45,660 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:41:45,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381246295] [2023-03-31 00:41:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:45,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:41:45,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:41:45,663 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) [2023-03-31 00:41:45,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:41:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:41:45,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 36 conjunts are in the unsatisfiable core [2023-03-31 00:41:45,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:41:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 00:41:45,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:41:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:41:46,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:41:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496727097] [2023-03-31 00:41:46,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:41:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381246295] [2023-03-31 00:41:46,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381246295] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 00:41:46,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:41:46,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-31 00:41:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268309244] [2023-03-31 00:41:46,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:41:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:41:46,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:41:46,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:41:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:41:46,168 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 00:41:48,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:41:50,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:41:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:41:50,622 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-03-31 00:41:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:41:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2023-03-31 00:41:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:41:50,624 INFO L225 Difference]: With dead ends: 39 [2023-03-31 00:41:50,624 INFO L226 Difference]: Without dead ends: 36 [2023-03-31 00:41:50,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:41:50,626 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:41:50,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-03-31 00:41:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-31 00:41:50,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-03-31 00:41:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:41:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-03-31 00:41:50,635 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2023-03-31 00:41:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:41:50,635 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-03-31 00:41:50,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 00:41:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-03-31 00:41:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 00:41:50,636 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:41:50,637 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-03-31 00:41:50,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:41:50,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:41:50,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:41:50,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:41:50,844 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 1 times [2023-03-31 00:41:50,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:41:50,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913441463] [2023-03-31 00:41:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:50,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:41:50,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:41:50,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975669765] [2023-03-31 00:41:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:50,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:41:50,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:41:50,862 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) [2023-03-31 00:41:50,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:41:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:41:50,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:41:50,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:41:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:41:50,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:41:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:41:51,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:41:51,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913441463] [2023-03-31 00:41:51,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:41:51,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975669765] [2023-03-31 00:41:51,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975669765] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:41:51,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:41:51,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 00:41:51,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720206087] [2023-03-31 00:41:51,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:41:51,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:41:51,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:41:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:41:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:41:51,070 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-03-31 00:41:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:41:51,223 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2023-03-31 00:41:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:41:51,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 42 [2023-03-31 00:41:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:41:51,225 INFO L225 Difference]: With dead ends: 69 [2023-03-31 00:41:51,225 INFO L226 Difference]: Without dead ends: 62 [2023-03-31 00:41:51,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:41:51,227 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:41:51,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 104 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:41:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-03-31 00:41:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2023-03-31 00:41:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 00:41:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2023-03-31 00:41:51,236 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 42 [2023-03-31 00:41:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:41:51,237 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2023-03-31 00:41:51,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-03-31 00:41:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2023-03-31 00:41:51,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 00:41:51,238 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:41:51,238 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-03-31 00:41:51,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-31 00:41:51,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:41:51,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:41:51,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:41:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash 758422658, now seen corresponding path program 1 times [2023-03-31 00:41:51,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:41:51,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582497441] [2023-03-31 00:41:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:51,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:41:51,459 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:41:51,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779176807] [2023-03-31 00:41:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:41:51,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:41:51,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:41:51,461 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) [2023-03-31 00:41:51,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process