/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/loop-acceleration/simple_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:25:37,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:25:37,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:25:37,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 01:25:37,240 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 [2023-04-02 01:25:37,257 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:25:37,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:25:37,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:25:37,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:25:37,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:25:37,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:25:37,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:25:37,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:25:37,259 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:25:37,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:25:37,260 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:25:37,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:25:37,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:25:37,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:25:37,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:25:37,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:25:37,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:25:37,260 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:25:37,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:25:37,261 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:25:37,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:25:37,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:25:37,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:25:37,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:25:37,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:25:37,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:25:37,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:25:37,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:25:37,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:25:37,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:25:37,262 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:25:37,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:25:37,262 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:25:37,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:25:37,262 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:25:37,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:25:37,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:25:37,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:25:37,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:25:37,530 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:25:37,531 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:25:37,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_4-1.c [2023-04-02 01:25:38,677 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:25:38,841 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:25:38,841 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_4-1.c [2023-04-02 01:25:38,846 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84b126068/e400e768bb8c4f8b90a54a656bab3690/FLAG567834851 [2023-04-02 01:25:38,866 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84b126068/e400e768bb8c4f8b90a54a656bab3690 [2023-04-02 01:25:38,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:25:38,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:25:38,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:25:38,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:25:38,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:25:38,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:25:38" (1/1) ... [2023-04-02 01:25:38,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d44959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:38, skipping insertion in model container [2023-04-02 01:25:38,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:25:38" (1/1) ... [2023-04-02 01:25:38,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:25:38,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:25:38,992 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/loop-acceleration/simple_4-1.c[322,335] [2023-04-02 01:25:38,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:25:39,007 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:25:39,017 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/loop-acceleration/simple_4-1.c[322,335] [2023-04-02 01:25:39,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:25:39,029 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:25:39,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39 WrapperNode [2023-04-02 01:25:39,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:25:39,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:25:39,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:25:39,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:25:39,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (1/1) ... [2023-04-02 01:25:39,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (1/1) ... [2023-04-02 01:25:39,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (1/1) ... [2023-04-02 01:25:39,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (1/1) ... [2023-04-02 01:25:39,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (1/1) ... [2023-04-02 01:25:39,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (1/1) ... [2023-04-02 01:25:39,053 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (1/1) ... [2023-04-02 01:25:39,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (1/1) ... [2023-04-02 01:25:39,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:25:39,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:25:39,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:25:39,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:25:39,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (1/1) ... [2023-04-02 01:25:39,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:25:39,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:25:39,085 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) [2023-04-02 01:25:39,088 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 [2023-04-02 01:25:39,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:25:39,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:25:39,116 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:25:39,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:25:39,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:25:39,116 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:25:39,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:25:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:25:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:25:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:25:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:25:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:25:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:25:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:25:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:25:39,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:25:39,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:25:39,167 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:25:39,168 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:25:39,242 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:25:39,247 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:25:39,247 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 01:25:39,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:25:39 BoogieIcfgContainer [2023-04-02 01:25:39,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:25:39,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:25:39,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:25:39,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:25:39,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:25:38" (1/3) ... [2023-04-02 01:25:39,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cfb91f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:25:39, skipping insertion in model container [2023-04-02 01:25:39,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:25:39" (2/3) ... [2023-04-02 01:25:39,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cfb91f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:25:39, skipping insertion in model container [2023-04-02 01:25:39,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:25:39" (3/3) ... [2023-04-02 01:25:39,256 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2023-04-02 01:25:39,270 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:25:39,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:25:39,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:25:39,356 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;@113c140c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:25:39,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:25:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2023-04-02 01:25:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 01:25:39,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:25:39,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:25:39,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:25:39,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:25:39,379 INFO L85 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2023-04-02 01:25:39,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:25:39,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274188165] [2023-04-02 01:25:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:25:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:25:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:39,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:25:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:39,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:25:39,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274188165] [2023-04-02 01:25:39,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274188165] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:25:39,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:25:39,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 01:25:39,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104189292] [2023-04-02 01:25:39,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:25:39,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 01:25:39,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:25:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 01:25:39,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:25:39,638 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-04-02 01:25:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:25:39,696 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-02 01:25:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 01:25:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2023-04-02 01:25:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:25:39,703 INFO L225 Difference]: With dead ends: 29 [2023-04-02 01:25:39,703 INFO L226 Difference]: Without dead ends: 12 [2023-04-02 01:25:39,705 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 [2023-04-02 01:25:39,708 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:25:39,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:25:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-02 01:25:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-02 01:25:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 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) [2023-04-02 01:25:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-02 01:25:39,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2023-04-02 01:25:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:25:39,740 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-02 01:25:39,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-04-02 01:25:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-02 01:25:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 01:25:39,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:25:39,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:25:39,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:25:39,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:25:39,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:25:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2023-04-02 01:25:39,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:25:39,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873312459] [2023-04-02 01:25:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:25:39,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:25:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:39,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:25:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:39,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:25:39,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873312459] [2023-04-02 01:25:39,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873312459] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:25:39,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:25:39,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:25:39,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482503156] [2023-04-02 01:25:39,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:25:39,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:25:39,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:25:39,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:25:39,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:25:39,875 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-04-02 01:25:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:25:39,907 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2023-04-02 01:25:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:25:39,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2023-04-02 01:25:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:25:39,909 INFO L225 Difference]: With dead ends: 18 [2023-04-02 01:25:39,909 INFO L226 Difference]: Without dead ends: 13 [2023-04-02 01:25:39,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:25:39,911 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:25:39,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:25:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-02 01:25:39,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-04-02 01:25:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 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) [2023-04-02 01:25:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-04-02 01:25:39,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2023-04-02 01:25:39,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:25:39,918 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-04-02 01:25:39,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-04-02 01:25:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-04-02 01:25:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 01:25:39,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:25:39,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:25:39,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:25:39,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:25:39,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:25:39,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2023-04-02 01:25:39,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:25:39,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563107421] [2023-04-02 01:25:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:25:39,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:25:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:40,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:25:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:40,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:25:40,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563107421] [2023-04-02 01:25:40,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563107421] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:25:40,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608164792] [2023-04-02 01:25:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:25:40,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:25:40,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:25:40,059 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) [2023-04-02 01:25:40,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:25:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:40,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:25:40,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:25:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:40,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:25:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:40,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608164792] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:25:40,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:25:40,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-02 01:25:40,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366337843] [2023-04-02 01:25:40,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:25:40,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:25:40,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:25:40,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:25:40,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:25:40,269 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-04-02 01:25:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:25:40,379 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-04-02 01:25:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:25:40,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 12 [2023-04-02 01:25:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:25:40,381 INFO L225 Difference]: With dead ends: 21 [2023-04-02 01:25:40,381 INFO L226 Difference]: Without dead ends: 16 [2023-04-02 01:25:40,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:25:40,387 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:25:40,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 27 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:25:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-02 01:25:40,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-02 01:25:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 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) [2023-04-02 01:25:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-04-02 01:25:40,402 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2023-04-02 01:25:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:25:40,402 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-04-02 01:25:40,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-04-02 01:25:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-04-02 01:25:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 01:25:40,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:25:40,404 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:25:40,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 01:25:40,615 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 [2023-04-02 01:25:40,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:25:40,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:25:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1105142364, now seen corresponding path program 2 times [2023-04-02 01:25:40,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:25:40,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574838274] [2023-04-02 01:25:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:25:40,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:25:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:40,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:25:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:25:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574838274] [2023-04-02 01:25:40,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574838274] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:25:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324565690] [2023-04-02 01:25:40,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:25:40,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:25:40,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:25:40,843 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) [2023-04-02 01:25:40,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:25:40,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:25:40,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:25:40,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 01:25:40,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:25:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:40,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:25:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:41,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324565690] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:25:41,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:25:41,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-02 01:25:41,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501729463] [2023-04-02 01:25:41,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:25:41,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 01:25:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:25:41,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 01:25:41,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:25:41,063 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 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) [2023-04-02 01:25:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:25:41,456 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-04-02 01:25:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:25:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 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 15 [2023-04-02 01:25:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:25:41,458 INFO L225 Difference]: With dead ends: 27 [2023-04-02 01:25:41,458 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 01:25:41,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2023-04-02 01:25:41,459 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:25:41,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:25:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 01:25:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 01:25:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 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) [2023-04-02 01:25:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-04-02 01:25:41,471 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 15 [2023-04-02 01:25:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:25:41,471 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-04-02 01:25:41,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 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) [2023-04-02 01:25:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-04-02 01:25:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 01:25:41,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:25:41,474 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:25:41,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:25:41,674 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 [2023-04-02 01:25:41,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:25:41,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:25:41,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1967633380, now seen corresponding path program 3 times [2023-04-02 01:25:41,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:25:41,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969574653] [2023-04-02 01:25:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:25:41,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:25:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:41,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:25:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:41,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:25:41,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969574653] [2023-04-02 01:25:41,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969574653] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:25:41,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344266155] [2023-04-02 01:25:41,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:25:41,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:25:41,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:25:42,001 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) [2023-04-02 01:25:42,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:25:42,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 01:25:42,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:25:42,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 01:25:42,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:25:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:42,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:25:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:42,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344266155] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:25:42,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:25:42,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-02 01:25:42,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248813960] [2023-04-02 01:25:42,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:25:42,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 01:25:42,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:25:42,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 01:25:42,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2023-04-02 01:25:42,433 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 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) [2023-04-02 01:25:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:25:54,365 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-04-02 01:25:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 01:25:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 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 21 [2023-04-02 01:25:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:25:54,367 INFO L225 Difference]: With dead ends: 39 [2023-04-02 01:25:54,367 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 01:25:54,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 01:25:54,368 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:25:54,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 72 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 01:25:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 01:25:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 01:25:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 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) [2023-04-02 01:25:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2023-04-02 01:25:54,379 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 21 [2023-04-02 01:25:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:25:54,380 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2023-04-02 01:25:54,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 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) [2023-04-02 01:25:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2023-04-02 01:25:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 01:25:54,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:25:54,381 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:25:54,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:25:54,581 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 [2023-04-02 01:25:54,582 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:25:54,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:25:54,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1118023580, now seen corresponding path program 4 times [2023-04-02 01:25:54,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:25:54,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248832556] [2023-04-02 01:25:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:25:54,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:25:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:55,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:25:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:25:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:55,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:25:55,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248832556] [2023-04-02 01:25:55,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248832556] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:25:55,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157108705] [2023-04-02 01:25:55,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:25:55,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:25:55,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:25:55,169 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) [2023-04-02 01:25:55,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:25:55,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:25:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:25:55,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-02 01:25:55,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:25:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:55,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:25:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:25:56,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157108705] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:25:56,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:25:56,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-04-02 01:25:56,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368504918] [2023-04-02 01:25:56,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:25:56,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 01:25:56,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:25:56,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 01:25:56,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 01:25:56,379 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 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) [2023-04-02 01:25:58,975 WARN L839 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ c_main_~x~0 4294967256) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 1 (mod (+ c_main_~x~0 4294967280) 4294967296)) (< 1 (mod (+ 4294967274 c_main_~x~0) 4294967296)) (< 1 (mod c_main_~x~0 4294967296)) (< 1 (mod (+ 4294967294 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967254 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967258 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967292 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967286 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967272 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967270 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967264) 4294967296)) (< 1 (mod (+ 4294967260 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967288 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967290 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967284) 4294967296)) (< 1 (mod (+ 4294967252 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967262 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967276 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967278 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967268 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967282 c_main_~x~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 1 (mod (+ 4294967266 c_main_~x~0) 4294967296))) is different from false [2023-04-02 01:26:00,984 WARN L839 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ c_main_~x~0 4294967256) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967280) 4294967296)) (< 1 (mod (+ 4294967274 c_main_~x~0) 4294967296)) (< 1 (mod c_main_~x~0 4294967296)) (< 1 (mod (+ 4294967294 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967254 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967258 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967292 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967286 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967272 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967270 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967264) 4294967296)) (< 1 (mod (+ 4294967260 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967288 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967290 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967284) 4294967296)) (< 1 (mod (+ 4294967262 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967276 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967278 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967268 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967282 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967266 c_main_~x~0) 4294967296))) is different from false [2023-04-02 01:26:02,998 WARN L839 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ c_main_~x~0 4294967256) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967280) 4294967296)) (< 1 (mod (+ 4294967274 c_main_~x~0) 4294967296)) (< 1 (mod c_main_~x~0 4294967296)) (< 1 (mod (+ 4294967294 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967258 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967292 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967286 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967272 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967270 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967264) 4294967296)) (< 1 (mod (+ 4294967260 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967288 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967290 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967284) 4294967296)) (< 1 (mod (+ 4294967262 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967276 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967278 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967268 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967282 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967266 c_main_~x~0) 4294967296))) is different from false [2023-04-02 01:26:49,753 WARN L223 SmtUtils]: Spent 31.79s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:27:20,286 WARN L223 SmtUtils]: Spent 23.35s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:27:50,895 WARN L223 SmtUtils]: Spent 19.30s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:28:18,147 WARN L223 SmtUtils]: Spent 18.56s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:28:34,208 WARN L223 SmtUtils]: Spent 9.81s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:28:48,138 WARN L223 SmtUtils]: Spent 9.43s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:29:07,252 WARN L223 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:29:23,406 WARN L839 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ c_main_~x~0 4294967256) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 1 (mod (+ c_main_~x~0 4294967280) 4294967296)) (< 1 (mod (+ 4294967274 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967294 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967254 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967258 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967292 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967286 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967272 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967270 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967264) 4294967296)) (< 1 (mod (+ 4294967260 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967288 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967290 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967284) 4294967296)) (< 1 (mod (+ 4294967252 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967262 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967276 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967278 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967268 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967282 c_main_~x~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 1 (mod (+ 4294967266 c_main_~x~0) 4294967296))) is different from false [2023-04-02 01:29:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:29:23,431 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2023-04-02 01:29:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 01:29:23,431 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 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 33 [2023-04-02 01:29:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:29:23,433 INFO L225 Difference]: With dead ends: 63 [2023-04-02 01:29:23,433 INFO L226 Difference]: Without dead ends: 58 [2023-04-02 01:29:23,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 205.7s TimeCoverageRelationStatistics Valid=2248, Invalid=6320, Unknown=4, NotChecked=740, Total=9312 [2023-04-02 01:29:23,437 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:29:23,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 146 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 620 Invalid, 0 Unknown, 133 Unchecked, 2.5s Time] [2023-04-02 01:29:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-02 01:29:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-04-02 01:29:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 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) [2023-04-02 01:29:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2023-04-02 01:29:23,458 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 33 [2023-04-02 01:29:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:29:23,458 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2023-04-02 01:29:23,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 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) [2023-04-02 01:29:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2023-04-02 01:29:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 01:29:23,460 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:29:23,460 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:29:23,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:29:23,665 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 [2023-04-02 01:29:23,666 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:29:23,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:29:23,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1947289956, now seen corresponding path program 5 times [2023-04-02 01:29:23,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:29:23,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922953978] [2023-04-02 01:29:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:29:23,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:29:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:29:25,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:29:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:29:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:29:25,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:29:25,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922953978] [2023-04-02 01:29:25,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922953978] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:29:25,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000276309] [2023-04-02 01:29:25,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:29:25,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:29:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:29:25,445 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) [2023-04-02 01:29:25,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process