/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/array-examples/standard_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:31:04,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:31:04,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:31:04,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:31:04,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:31:04,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:31:04,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:31:04,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:31:04,999 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:31:04,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:31:04,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:31:05,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:31:05,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:31:05,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:31:05,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:31:05,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:31:05,002 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:31:05,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:31:05,003 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:31:05,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:31:05,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:31:05,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:31:05,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:31:05,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:31:05,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:31:05,004 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:31:05,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:31:05,004 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:31:05,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:31:05,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:31:05,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:31:05,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:31:05,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:31:05,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:31:05,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:31:05,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:31:05,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:31:05,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:31:05,006 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:31:05,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:31:05,006 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:31:05,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:31:05,007 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:31:05,007 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:31:05,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:31:05,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:31:05,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:31:05,271 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:31:05,272 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:31:05,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init9_ground-2.i [2023-04-01 18:31:06,399 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:31:06,586 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:31:06,587 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-2.i [2023-04-01 18:31:06,592 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16515b595/b04c2214037848828ab44584b43481c9/FLAGa8a2eba8f [2023-04-01 18:31:06,604 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16515b595/b04c2214037848828ab44584b43481c9 [2023-04-01 18:31:06,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:31:06,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:31:06,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:31:06,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:31:06,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:31:06,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb6d52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06, skipping insertion in model container [2023-04-01 18:31:06,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:31:06,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:31:06,753 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/array-examples/standard_init9_ground-2.i[816,829] [2023-04-01 18:31:06,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:31:06,775 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:31:06,785 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/array-examples/standard_init9_ground-2.i[816,829] [2023-04-01 18:31:06,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:31:06,804 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:31:06,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06 WrapperNode [2023-04-01 18:31:06,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:31:06,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:31:06,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:31:06,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:31:06,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,829 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:31:06,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:31:06,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:31:06,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:31:06,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (1/1) ... [2023-04-01 18:31:06,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:31:06,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:06,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:31:06,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:31:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:31:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:31:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:31:06,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:31:06,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:31:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:31:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:31:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:31:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:31:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:31:06,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:31:06,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:31:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:31:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:31:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:31:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:31:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:31:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:31:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:31:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:31:06,956 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:31:06,958 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:31:07,189 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:31:07,194 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:31:07,194 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-01 18:31:07,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:31:07 BoogieIcfgContainer [2023-04-01 18:31:07,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:31:07,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:31:07,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:31:07,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:31:07,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:31:06" (1/3) ... [2023-04-01 18:31:07,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2264c52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:31:07, skipping insertion in model container [2023-04-01 18:31:07,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:06" (2/3) ... [2023-04-01 18:31:07,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2264c52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:31:07, skipping insertion in model container [2023-04-01 18:31:07,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:31:07" (3/3) ... [2023-04-01 18:31:07,213 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2023-04-01 18:31:07,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:31:07,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:31:07,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:31:07,327 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;@508f237c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:31:07,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:31:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 32 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:31:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 18:31:07,342 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:07,342 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] [2023-04-01 18:31:07,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:07,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash 854561547, now seen corresponding path program 1 times [2023-04-01 18:31:07,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:07,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682859961] [2023-04-01 18:31:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:07,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:07,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:31:07,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682859961] [2023-04-01 18:31:07,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682859961] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:31:07,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:31:07,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:31:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952561648] [2023-04-01 18:31:07,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:31:07,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:31:07,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:07,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:31:07,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:31:07,573 INFO L87 Difference]: Start difference. First operand has 39 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 32 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:07,701 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2023-04-01 18:31:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:31:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (3), 3 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 29 [2023-04-01 18:31:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:07,711 INFO L225 Difference]: With dead ends: 71 [2023-04-01 18:31:07,712 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 18:31:07,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:31:07,720 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:07,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 10 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 18:31:07,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 18:31:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-04-01 18:31:07,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 29 [2023-04-01 18:31:07,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:07,773 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-04-01 18:31:07,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-04-01 18:31:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 18:31:07,775 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:07,775 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] [2023-04-01 18:31:07,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:31:07,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:07,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash -58046209, now seen corresponding path program 1 times [2023-04-01 18:31:07,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:07,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878261131] [2023-04-01 18:31:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:07,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:07,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:31:07,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:07,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878261131] [2023-04-01 18:31:07,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878261131] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:31:07,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:31:07,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:31:07,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629423464] [2023-04-01 18:31:07,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:31:07,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:31:07,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:07,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:31:07,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:31:07,932 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:08,068 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2023-04-01 18:31:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:31:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 3 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 29 [2023-04-01 18:31:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:08,071 INFO L225 Difference]: With dead ends: 70 [2023-04-01 18:31:08,071 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 18:31:08,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:31:08,079 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:08,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 12 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 18:31:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-01 18:31:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-04-01 18:31:08,104 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2023-04-01 18:31:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:08,104 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-04-01 18:31:08,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-04-01 18:31:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 18:31:08,106 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:08,107 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] [2023-04-01 18:31:08,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:31:08,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:08,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1753432375, now seen corresponding path program 1 times [2023-04-01 18:31:08,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958999446] [2023-04-01 18:31:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:08,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:08,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 18:31:08,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:08,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958999446] [2023-04-01 18:31:08,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958999446] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:08,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076725180] [2023-04-01 18:31:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:08,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:08,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:08,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:08,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:31:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:08,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:31:08,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 18:31:08,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 18:31:08,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076725180] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:08,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:08,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:31:08,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344964985] [2023-04-01 18:31:08,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:08,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:31:08,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:08,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:31:08,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:31:08,451 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:08,675 INFO L93 Difference]: Finished difference Result 105 states and 149 transitions. [2023-04-01 18:31:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:31:08,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-04-01 18:31:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:08,678 INFO L225 Difference]: With dead ends: 105 [2023-04-01 18:31:08,678 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 18:31:08,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:31:08,681 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:08,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 12 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 18:31:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-04-01 18:31:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:08,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2023-04-01 18:31:08,705 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 38 [2023-04-01 18:31:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:08,705 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2023-04-01 18:31:08,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2023-04-01 18:31:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 18:31:08,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:08,710 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:08,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 18:31:08,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:08,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:08,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1526458111, now seen corresponding path program 2 times [2023-04-01 18:31:08,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:08,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956392612] [2023-04-01 18:31:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:08,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:09,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 18:31:09,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:09,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956392612] [2023-04-01 18:31:09,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956392612] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:09,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575911541] [2023-04-01 18:31:09,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:31:09,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:09,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:09,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:09,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:31:09,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:31:09,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:09,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:31:09,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 18:31:09,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 18:31:09,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575911541] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:09,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:09,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:31:09,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016161045] [2023-04-01 18:31:09,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:09,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:31:09,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:09,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:31:09,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:31:09,479 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:09,878 INFO L93 Difference]: Finished difference Result 183 states and 254 transitions. [2023-04-01 18:31:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:31:09,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-01 18:31:09,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:09,879 INFO L225 Difference]: With dead ends: 183 [2023-04-01 18:31:09,879 INFO L226 Difference]: Without dead ends: 124 [2023-04-01 18:31:09,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:31:09,881 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 127 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:09,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 22 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:31:09,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-01 18:31:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-04-01 18:31:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 118 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2023-04-01 18:31:09,902 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 65 [2023-04-01 18:31:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:09,903 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2023-04-01 18:31:09,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2023-04-01 18:31:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 18:31:09,904 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:09,905 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:09,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:10,111 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 [2023-04-01 18:31:10,111 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:10,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash -617540609, now seen corresponding path program 3 times [2023-04-01 18:31:10,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:10,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104692921] [2023-04-01 18:31:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:10,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:10,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-01 18:31:10,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:10,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104692921] [2023-04-01 18:31:10,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104692921] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:10,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602188428] [2023-04-01 18:31:10,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:31:10,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:10,637 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:10,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:31:30,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 18:31:30,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:30,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:31:30,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-01 18:31:30,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-01 18:31:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602188428] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:30,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:30,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:31:30,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844341075] [2023-04-01 18:31:30,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:30,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:31:30,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:31:30,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:31:30,875 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:31,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:31,756 INFO L93 Difference]: Finished difference Result 339 states and 464 transitions. [2023-04-01 18:31:31,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:31:31,756 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2023-04-01 18:31:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:31,759 INFO L225 Difference]: With dead ends: 339 [2023-04-01 18:31:31,759 INFO L226 Difference]: Without dead ends: 232 [2023-04-01 18:31:31,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:31:31,762 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 235 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:31,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 22 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:31:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-01 18:31:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2023-04-01 18:31:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0442477876106195) internal successors, (236), 226 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 241 transitions. [2023-04-01 18:31:31,799 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 241 transitions. Word has length 119 [2023-04-01 18:31:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:31,800 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 241 transitions. [2023-04-01 18:31:31,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 241 transitions. [2023-04-01 18:31:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-04-01 18:31:31,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:31,804 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:31,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:32,017 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 [2023-04-01 18:31:32,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:32,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash 358018559, now seen corresponding path program 4 times [2023-04-01 18:31:32,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:32,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773662063] [2023-04-01 18:31:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:32,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:33,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-04-01 18:31:33,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:33,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773662063] [2023-04-01 18:31:33,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773662063] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:33,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370574042] [2023-04-01 18:31:33,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:31:33,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:33,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:33,674 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:33,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:31:34,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:31:34,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:34,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 18:31:34,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-04-01 18:31:34,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-04-01 18:31:34,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370574042] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:34,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:34,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-04-01 18:31:34,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051844499] [2023-04-01 18:31:34,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:34,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 18:31:34,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:34,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 18:31:34,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:31:34,787 INFO L87 Difference]: Start difference. First operand 232 states and 241 transitions. Second operand has 50 states, 50 states have (on average 1.64) internal successors, (82), 49 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:37,013 INFO L93 Difference]: Finished difference Result 651 states and 884 transitions. [2023-04-01 18:31:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 18:31:37,014 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 49 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2023-04-01 18:31:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:37,016 INFO L225 Difference]: With dead ends: 651 [2023-04-01 18:31:37,016 INFO L226 Difference]: Without dead ends: 448 [2023-04-01 18:31:37,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 18:31:37,023 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 451 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 1378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1378 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:37,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 37 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1378 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 18:31:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-04-01 18:31:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2023-04-01 18:31:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 442 states have (on average 1.0226244343891402) internal successors, (452), 442 states have internal predecessors, (452), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 457 transitions. [2023-04-01 18:31:37,067 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 457 transitions. Word has length 227 [2023-04-01 18:31:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:37,068 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 457 transitions. [2023-04-01 18:31:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 49 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 457 transitions. [2023-04-01 18:31:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-04-01 18:31:37,076 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:37,076 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:37,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:37,284 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 [2023-04-01 18:31:37,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:37,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:37,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1183800833, now seen corresponding path program 5 times [2023-04-01 18:31:37,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:37,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045736688] [2023-04-01 18:31:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:37,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:41,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9729 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 8648 trivial. 0 not checked. [2023-04-01 18:31:41,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:41,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045736688] [2023-04-01 18:31:41,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045736688] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:41,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710634129] [2023-04-01 18:31:41,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:31:41,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:41,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:41,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:41,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process