/usr/lib/jvm/java-1.11.0-openjdk-amd64/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 --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 17:13:34,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 17:13:34,147 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 17:13:34,151 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 17:13:34,152 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 17:13:34,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 17:13:34,173 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 17:13:34,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 17:13:34,173 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 17:13:34,176 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 17:13:34,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 17:13:34,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 17:13:34,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 17:13:34,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 17:13:34,179 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 17:13:34,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 17:13:34,179 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 17:13:34,179 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 17:13:34,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 17:13:34,180 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 17:13:34,180 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 17:13:34,180 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 17:13:34,181 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 17:13:34,181 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 17:13:34,181 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 17:13:34,181 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 17:13:34,181 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 17:13:34,181 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 17:13:34,182 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 17:13:34,182 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 17:13:34,183 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 17:13:34,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 17:13:34,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:13:34,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 17:13:34,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 17:13:34,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 17:13:34,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 17:13:34,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 17:13:34,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 17:13:34,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 17:13:34,184 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 17:13:34,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 17:13:34,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 17:13:34,184 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 17:13:34,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 17:13:34,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 17:13:34,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 17:13:34,398 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 17:13:34,398 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 17:13:34,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2023-12-15 17:13:35,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 17:13:35,703 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 17:13:35,704 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2023-12-15 17:13:35,714 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f2affd1/df31953e19654081b6ebc333ccf09442/FLAG9488aea67 [2023-12-15 17:13:36,116 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f2affd1/df31953e19654081b6ebc333ccf09442 [2023-12-15 17:13:36,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 17:13:36,119 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 17:13:36,119 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 17:13:36,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 17:13:36,123 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 17:13:36,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,124 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5815f17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36, skipping insertion in model container [2023-12-15 17:13:36,124 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,140 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 17:13:36,239 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c[406,419] [2023-12-15 17:13:36,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:13:36,261 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 17:13:36,269 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c[406,419] [2023-12-15 17:13:36,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:13:36,321 INFO L206 MainTranslator]: Completed translation [2023-12-15 17:13:36,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36 WrapperNode [2023-12-15 17:13:36,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 17:13:36,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 17:13:36,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 17:13:36,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 17:13:36,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,376 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2023-12-15 17:13:36,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 17:13:36,377 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 17:13:36,377 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 17:13:36,377 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 17:13:36,384 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,405 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,414 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-15 17:13:36,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,418 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,454 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 17:13:36,456 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 17:13:36,456 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 17:13:36,456 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 17:13:36,457 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (1/1) ... [2023-12-15 17:13:36,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:13:36,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:36,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 17:13:36,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 17:13:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 17:13:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 17:13:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 17:13:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 17:13:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 17:13:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-15 17:13:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 17:13:36,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 17:13:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 17:13:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 17:13:36,568 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 17:13:36,569 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 17:13:36,712 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 17:13:36,737 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 17:13:36,737 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-15 17:13:36,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:13:36 BoogieIcfgContainer [2023-12-15 17:13:36,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 17:13:36,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 17:13:36,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 17:13:36,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 17:13:36,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 05:13:36" (1/3) ... [2023-12-15 17:13:36,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d330a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:13:36, skipping insertion in model container [2023-12-15 17:13:36,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:36" (2/3) ... [2023-12-15 17:13:36,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d330a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:13:36, skipping insertion in model container [2023-12-15 17:13:36,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:13:36" (3/3) ... [2023-12-15 17:13:36,743 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2023-12-15 17:13:36,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 17:13:36,756 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 17:13:36,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 17:13:36,789 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=LoopHeads, 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;@5e074ac4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 17:13:36,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 17:13:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 17:13:36,796 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:36,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:36,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:36,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash -978184044, now seen corresponding path program 1 times [2023-12-15 17:13:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:36,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533839793] [2023-12-15 17:13:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:36,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:36,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533839793] [2023-12-15 17:13:36,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533839793] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:13:36,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:13:36,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 17:13:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677324423] [2023-12-15 17:13:36,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:13:36,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 17:13:36,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:36,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 17:13:36,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 17:13:36,949 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:36,993 INFO L93 Difference]: Finished difference Result 41 states and 68 transitions. [2023-12-15 17:13:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 17:13:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-15 17:13:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:37,000 INFO L225 Difference]: With dead ends: 41 [2023-12-15 17:13:37,000 INFO L226 Difference]: Without dead ends: 19 [2023-12-15 17:13:37,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 17:13:37,006 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:37,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-15 17:13:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-15 17:13:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-12-15 17:13:37,028 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 18 [2023-12-15 17:13:37,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:37,029 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-12-15 17:13:37,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-12-15 17:13:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-15 17:13:37,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:37,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:37,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 17:13:37,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:37,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2084842272, now seen corresponding path program 1 times [2023-12-15 17:13:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:37,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020422606] [2023-12-15 17:13:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:37,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:37,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:37,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020422606] [2023-12-15 17:13:37,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020422606] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:13:37,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:13:37,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 17:13:37,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085406493] [2023-12-15 17:13:37,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:13:37,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 17:13:37,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 17:13:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 17:13:37,201 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:37,244 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2023-12-15 17:13:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 17:13:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-15 17:13:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:37,245 INFO L225 Difference]: With dead ends: 36 [2023-12-15 17:13:37,245 INFO L226 Difference]: Without dead ends: 20 [2023-12-15 17:13:37,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 17:13:37,246 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:37,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-15 17:13:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-15 17:13:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-12-15 17:13:37,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2023-12-15 17:13:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:37,251 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-12-15 17:13:37,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-12-15 17:13:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-15 17:13:37,252 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:37,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:37,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 17:13:37,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:37,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash 194798549, now seen corresponding path program 1 times [2023-12-15 17:13:37,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:37,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372113325] [2023-12-15 17:13:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:37,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 17:13:37,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:37,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372113325] [2023-12-15 17:13:37,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372113325] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:13:37,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:13:37,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 17:13:37,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859682411] [2023-12-15 17:13:37,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:13:37,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 17:13:37,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:37,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 17:13:37,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 17:13:37,313 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:37,368 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2023-12-15 17:13:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 17:13:37,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-15 17:13:37,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:37,369 INFO L225 Difference]: With dead ends: 40 [2023-12-15 17:13:37,370 INFO L226 Difference]: Without dead ends: 26 [2023-12-15 17:13:37,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 17:13:37,373 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:37,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-15 17:13:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-15 17:13:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-12-15 17:13:37,377 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2023-12-15 17:13:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:37,377 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-12-15 17:13:37,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-12-15 17:13:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-15 17:13:37,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:37,378 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] [2023-12-15 17:13:37,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 17:13:37,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:37,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2129242726, now seen corresponding path program 1 times [2023-12-15 17:13:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:37,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165279733] [2023-12-15 17:13:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:13:37,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165279733] [2023-12-15 17:13:37,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165279733] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159895535] [2023-12-15 17:13:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:37,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:37,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:37,452 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) [2023-12-15 17:13:37,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 17:13:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:37,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 17:13:37,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:13:37,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:13:37,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159895535] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:37,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:37,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-15 17:13:37,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226231959] [2023-12-15 17:13:37,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:37,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 17:13:37,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:37,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 17:13:37,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-15 17:13:37,577 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:37,601 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-12-15 17:13:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 17:13:37,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-15 17:13:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:37,602 INFO L225 Difference]: With dead ends: 49 [2023-12-15 17:13:37,602 INFO L226 Difference]: Without dead ends: 27 [2023-12-15 17:13:37,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-15 17:13:37,603 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:37,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-15 17:13:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-15 17:13:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-12-15 17:13:37,606 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 25 [2023-12-15 17:13:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:37,606 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-12-15 17:13:37,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-12-15 17:13:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 17:13:37,607 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:37,607 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:37,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:37,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:37,813 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:37,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 851695429, now seen corresponding path program 2 times [2023-12-15 17:13:37,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:37,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117925995] [2023-12-15 17:13:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 17:13:37,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:37,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117925995] [2023-12-15 17:13:37,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117925995] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:37,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364218007] [2023-12-15 17:13:37,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:13:37,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:37,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:37,905 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) [2023-12-15 17:13:37,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 17:13:37,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:13:37,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:37,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 17:13:37,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 17:13:37,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 17:13:38,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364218007] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:38,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:38,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-15 17:13:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662577212] [2023-12-15 17:13:38,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:38,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 17:13:38,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 17:13:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-15 17:13:38,017 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:38,064 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2023-12-15 17:13:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 17:13:38,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-15 17:13:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:38,065 INFO L225 Difference]: With dead ends: 52 [2023-12-15 17:13:38,065 INFO L226 Difference]: Without dead ends: 33 [2023-12-15 17:13:38,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-15 17:13:38,066 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:38,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-15 17:13:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-15 17:13:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-12-15 17:13:38,085 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2023-12-15 17:13:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:38,085 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-12-15 17:13:38,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-12-15 17:13:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-15 17:13:38,086 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:38,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:38,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-15 17:13:38,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:38,290 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:38,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:38,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1536224032, now seen corresponding path program 3 times [2023-12-15 17:13:38,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:38,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115474052] [2023-12-15 17:13:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:38,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115474052] [2023-12-15 17:13:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115474052] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750360312] [2023-12-15 17:13:39,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:13:39,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:39,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:39,802 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) [2023-12-15 17:13:39,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 17:13:39,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-15 17:13:39,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:39,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-15 17:13:39,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:39,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:13:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:40,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:13:40,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750360312] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:40,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:40,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 24 [2023-12-15 17:13:40,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374090687] [2023-12-15 17:13:40,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:40,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 17:13:40,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 17:13:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-12-15 17:13:40,262 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:40,517 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-12-15 17:13:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 17:13:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-15 17:13:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:40,518 INFO L225 Difference]: With dead ends: 58 [2023-12-15 17:13:40,518 INFO L226 Difference]: Without dead ends: 54 [2023-12-15 17:13:40,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-12-15 17:13:40,519 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:40,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 114 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:13:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-15 17:13:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2023-12-15 17:13:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2023-12-15 17:13:40,526 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 32 [2023-12-15 17:13:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:40,527 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2023-12-15 17:13:40,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2023-12-15 17:13:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-15 17:13:40,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:40,527 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:40,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:40,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:40,748 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:40,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash -349916750, now seen corresponding path program 4 times [2023-12-15 17:13:40,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:40,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270021531] [2023-12-15 17:13:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:40,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:13:40,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:40,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270021531] [2023-12-15 17:13:40,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270021531] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:40,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314645223] [2023-12-15 17:13:40,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:13:40,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:40,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:40,853 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) [2023-12-15 17:13:40,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 17:13:40,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:13:40,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:40,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 17:13:40,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:13:40,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-15 17:13:41,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314645223] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:41,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:41,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-15 17:13:41,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869678860] [2023-12-15 17:13:41,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:41,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 17:13:41,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:41,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 17:13:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-15 17:13:41,020 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:41,183 INFO L93 Difference]: Finished difference Result 117 states and 142 transitions. [2023-12-15 17:13:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-15 17:13:41,184 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-15 17:13:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:41,184 INFO L225 Difference]: With dead ends: 117 [2023-12-15 17:13:41,184 INFO L226 Difference]: Without dead ends: 67 [2023-12-15 17:13:41,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-15 17:13:41,185 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:41,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 34 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-15 17:13:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-12-15 17:13:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-12-15 17:13:41,190 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2023-12-15 17:13:41,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:41,191 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-12-15 17:13:41,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-12-15 17:13:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-15 17:13:41,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:41,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:41,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:41,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:41,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:41,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1925180140, now seen corresponding path program 5 times [2023-12-15 17:13:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:41,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345172797] [2023-12-15 17:13:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:41,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-15 17:13:41,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:41,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345172797] [2023-12-15 17:13:41,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345172797] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:41,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210629807] [2023-12-15 17:13:41,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:13:41,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:41,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:41,472 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) [2023-12-15 17:13:41,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 17:13:41,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-15 17:13:41,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:41,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 17:13:41,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-15 17:13:41,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-15 17:13:41,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210629807] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:41,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:41,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-15 17:13:41,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63260623] [2023-12-15 17:13:41,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:41,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 17:13:41,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:41,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 17:13:41,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-15 17:13:41,648 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:41,786 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2023-12-15 17:13:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-15 17:13:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-15 17:13:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:41,786 INFO L225 Difference]: With dead ends: 60 [2023-12-15 17:13:41,786 INFO L226 Difference]: Without dead ends: 40 [2023-12-15 17:13:41,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-12-15 17:13:41,787 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:41,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 19 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-15 17:13:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-15 17:13:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-12-15 17:13:41,791 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 34 [2023-12-15 17:13:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:41,791 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-12-15 17:13:41,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-12-15 17:13:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-15 17:13:41,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:41,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:41,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:41,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:41,997 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:41,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1072637658, now seen corresponding path program 6 times [2023-12-15 17:13:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:41,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897924704] [2023-12-15 17:13:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:44,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:44,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897924704] [2023-12-15 17:13:44,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897924704] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:44,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434516138] [2023-12-15 17:13:44,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:13:44,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:44,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:44,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:13:44,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 17:13:44,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-15 17:13:44,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:44,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-15 17:13:44,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:13:44,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:45,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:13:45,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-12-15 17:13:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:13:45,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434516138] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:45,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:45,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12, 12] total 48 [2023-12-15 17:13:45,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522493809] [2023-12-15 17:13:45,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:45,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-15 17:13:45,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-15 17:13:45,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2071, Unknown=0, NotChecked=0, Total=2256 [2023-12-15 17:13:45,277 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:46,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:46,308 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2023-12-15 17:13:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 17:13:46,308 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-15 17:13:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:46,311 INFO L225 Difference]: With dead ends: 74 [2023-12-15 17:13:46,311 INFO L226 Difference]: Without dead ends: 70 [2023-12-15 17:13:46,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=364, Invalid=3668, Unknown=0, NotChecked=0, Total=4032 [2023-12-15 17:13:46,315 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:46,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 111 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 17:13:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-15 17:13:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2023-12-15 17:13:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-12-15 17:13:46,339 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 39 [2023-12-15 17:13:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:46,339 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-12-15 17:13:46,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-12-15 17:13:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-15 17:13:46,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:46,345 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:46,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:46,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:46,550 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:46,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1079582984, now seen corresponding path program 7 times [2023-12-15 17:13:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:46,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930523415] [2023-12-15 17:13:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:46,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-15 17:13:46,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:46,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930523415] [2023-12-15 17:13:46,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930523415] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:46,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026843633] [2023-12-15 17:13:46,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 17:13:46,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:46,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:46,730 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:13:46,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 17:13:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:46,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 17:13:46,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-15 17:13:46,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-15 17:13:46,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026843633] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:46,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:46,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-15 17:13:46,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268291342] [2023-12-15 17:13:46,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:46,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 17:13:46,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:46,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 17:13:46,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-15 17:13:46,958 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:47,150 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2023-12-15 17:13:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 17:13:47,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-15 17:13:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:47,151 INFO L225 Difference]: With dead ends: 139 [2023-12-15 17:13:47,151 INFO L226 Difference]: Without dead ends: 78 [2023-12-15 17:13:47,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-15 17:13:47,152 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:47,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 31 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:13:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-15 17:13:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2023-12-15 17:13:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2023-12-15 17:13:47,167 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 40 [2023-12-15 17:13:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:47,168 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2023-12-15 17:13:47,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2023-12-15 17:13:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-15 17:13:47,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:47,172 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:47,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:47,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:47,378 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:47,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:47,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2102397606, now seen corresponding path program 8 times [2023-12-15 17:13:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:47,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461018285] [2023-12-15 17:13:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-15 17:13:47,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:47,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461018285] [2023-12-15 17:13:47,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461018285] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:47,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89501536] [2023-12-15 17:13:47,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:13:47,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:47,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:47,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:13:47,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 17:13:47,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:13:47,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:47,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 17:13:47,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-15 17:13:47,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-15 17:13:47,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89501536] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:47,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:47,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-15 17:13:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481753351] [2023-12-15 17:13:47,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:47,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 17:13:47,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 17:13:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-15 17:13:47,707 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:47,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:47,881 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2023-12-15 17:13:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 17:13:47,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-15 17:13:47,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:47,883 INFO L225 Difference]: With dead ends: 71 [2023-12-15 17:13:47,883 INFO L226 Difference]: Without dead ends: 47 [2023-12-15 17:13:47,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-12-15 17:13:47,884 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:47,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 28 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-15 17:13:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-12-15 17:13:47,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-12-15 17:13:47,888 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 41 [2023-12-15 17:13:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:47,888 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-12-15 17:13:47,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:47,890 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-12-15 17:13:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-15 17:13:47,890 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:47,890 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-15 17:13:47,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:48,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-15 17:13:48,096 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:48,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1513214304, now seen corresponding path program 9 times [2023-12-15 17:13:48,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:48,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18016019] [2023-12-15 17:13:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:48,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:50,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:50,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18016019] [2023-12-15 17:13:50,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18016019] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:50,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691391517] [2023-12-15 17:13:50,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:13:50,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:50,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:50,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:13:50,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 17:13:50,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 17:13:50,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:50,808 WARN L260 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 122 conjunts are in the unsatisfiable core [2023-12-15 17:13:50,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:50,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-15 17:13:52,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:13:52,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2023-12-15 17:13:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:13:52,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:13:53,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691391517] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:53,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:53,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26, 27] total 84 [2023-12-15 17:13:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961346558] [2023-12-15 17:13:53,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:53,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-15 17:13:53,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-15 17:13:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=6476, Unknown=0, NotChecked=0, Total=6972 [2023-12-15 17:13:53,522 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 84 states, 84 states have (on average 1.5238095238095237) internal successors, (128), 84 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:57,766 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2023-12-15 17:13:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-15 17:13:57,766 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.5238095238095237) internal successors, (128), 84 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-15 17:13:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:57,768 INFO L225 Difference]: With dead ends: 176 [2023-12-15 17:13:57,768 INFO L226 Difference]: Without dead ends: 139 [2023-12-15 17:13:57,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3998 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1614, Invalid=14642, Unknown=0, NotChecked=0, Total=16256 [2023-12-15 17:13:57,771 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 299 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 2606 mSolverCounterSat, 761 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 2606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:57,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 272 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [761 Valid, 2606 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-15 17:13:57,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-15 17:13:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 103. [2023-12-15 17:13:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 102 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2023-12-15 17:13:57,793 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 46 [2023-12-15 17:13:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:57,793 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2023-12-15 17:13:57,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.5238095238095237) internal successors, (128), 84 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2023-12-15 17:13:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-15 17:13:57,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:57,794 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:57,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:58,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:58,001 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:58,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash 363384818, now seen corresponding path program 10 times [2023-12-15 17:13:58,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:58,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324363177] [2023-12-15 17:13:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:58,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-15 17:13:58,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:58,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324363177] [2023-12-15 17:13:58,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324363177] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:58,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979715612] [2023-12-15 17:13:58,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:13:58,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:58,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:58,125 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:13:58,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 17:13:58,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:13:58,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:58,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 17:13:58,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-15 17:13:58,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-15 17:13:58,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979715612] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:58,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:58,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-15 17:13:58,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533146902] [2023-12-15 17:13:58,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:58,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-15 17:13:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:58,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-15 17:13:58,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-15 17:13:58,402 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:58,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:58,623 INFO L93 Difference]: Finished difference Result 159 states and 182 transitions. [2023-12-15 17:13:58,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 17:13:58,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-15 17:13:58,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:58,624 INFO L225 Difference]: With dead ends: 159 [2023-12-15 17:13:58,624 INFO L226 Difference]: Without dead ends: 58 [2023-12-15 17:13:58,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-12-15 17:13:58,624 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:58,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 31 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:13:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-15 17:13:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2023-12-15 17:13:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2023-12-15 17:13:58,632 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 47 [2023-12-15 17:13:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:58,632 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2023-12-15 17:13:58,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2023-12-15 17:13:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-15 17:13:58,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:58,632 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:58,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:58,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-15 17:13:58,836 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:58,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:58,837 INFO L85 PathProgramCache]: Analyzing trace with hash -697822856, now seen corresponding path program 11 times [2023-12-15 17:13:58,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:58,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553042137] [2023-12-15 17:13:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:58,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-12-15 17:13:58,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553042137] [2023-12-15 17:13:58,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553042137] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:58,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360685582] [2023-12-15 17:13:58,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:13:58,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:58,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:58,987 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:13:58,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 17:13:59,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-15 17:13:59,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:59,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 17:13:59,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-12-15 17:13:59,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-12-15 17:13:59,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360685582] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:59,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:59,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-15 17:13:59,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675918533] [2023-12-15 17:13:59,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:59,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-15 17:13:59,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:59,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-15 17:13:59,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-15 17:13:59,288 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:59,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:59,462 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-12-15 17:13:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-15 17:13:59,462 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-15 17:13:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:59,462 INFO L225 Difference]: With dead ends: 58 [2023-12-15 17:13:59,462 INFO L226 Difference]: Without dead ends: 54 [2023-12-15 17:13:59,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2023-12-15 17:13:59,463 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:59,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-15 17:13:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-15 17:13:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-12-15 17:13:59,470 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 52 [2023-12-15 17:13:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:59,471 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-12-15 17:13:59,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-12-15 17:13:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-15 17:13:59,471 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:59,471 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:59,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-15 17:13:59,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-15 17:13:59,672 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:59,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:59,672 INFO L85 PathProgramCache]: Analyzing trace with hash -129284070, now seen corresponding path program 12 times [2023-12-15 17:13:59,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:59,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035268524] [2023-12-15 17:13:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:59,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:14:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:14:02,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:14:02,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035268524] [2023-12-15 17:14:02,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035268524] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:14:02,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189608279] [2023-12-15 17:14:02,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:14:02,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:02,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:14:02,951 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 17:14:02,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 17:14:03,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-15 17:14:03,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:14:03,025 WARN L260 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 151 conjunts are in the unsatisfiable core [2023-12-15 17:14:03,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:14:03,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 17:14:05,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:14:05,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-12-15 17:14:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:14:05,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-15 17:14:44,843 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:14:44,844 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:14:45,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-15 17:14:46,044 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-15 17:14:46,078 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 17:14:46,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-15 17:14:46,078 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 54 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while executing Executor. [2023-12-15 17:14:46,081 INFO L445 BasicCegarLoop]: Path program histogram: [12, 1, 1, 1] [2023-12-15 17:14:46,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-15 17:14:46,085 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 17:14:46,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 05:14:46 BoogieIcfgContainer [2023-12-15 17:14:46,087 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 17:14:46,088 INFO L158 Benchmark]: Toolchain (without parser) took 69969.11ms. Allocated memory was 385.9MB in the beginning and 803.2MB in the end (delta: 417.3MB). Free memory was 341.6MB in the beginning and 306.3MB in the end (delta: 35.3MB). Peak memory consumption was 453.9MB. Max. memory is 8.0GB. [2023-12-15 17:14:46,088 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 197.1MB. Free memory is still 146.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 17:14:46,088 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.02ms. Allocated memory is still 385.9MB. Free memory was 341.6MB in the beginning and 330.1MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 17:14:46,089 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.48ms. Allocated memory is still 385.9MB. Free memory was 330.1MB in the beginning and 328.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:14:46,089 INFO L158 Benchmark]: Boogie Preprocessor took 78.57ms. Allocated memory is still 385.9MB. Free memory was 328.4MB in the beginning and 326.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:14:46,089 INFO L158 Benchmark]: RCFGBuilder took 281.18ms. Allocated memory is still 385.9MB. Free memory was 326.3MB in the beginning and 312.0MB in the end (delta: 14.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-15 17:14:46,089 INFO L158 Benchmark]: TraceAbstraction took 69348.64ms. Allocated memory was 385.9MB in the beginning and 803.2MB in the end (delta: 417.3MB). Free memory was 311.2MB in the beginning and 306.3MB in the end (delta: 4.9MB). Peak memory consumption was 423.5MB. Max. memory is 8.0GB. [2023-12-15 17:14:46,092 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 197.1MB. Free memory is still 146.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 202.02ms. Allocated memory is still 385.9MB. Free memory was 341.6MB in the beginning and 330.1MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 54.48ms. Allocated memory is still 385.9MB. Free memory was 330.1MB in the beginning and 328.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 78.57ms. Allocated memory is still 385.9MB. Free memory was 328.4MB in the beginning and 326.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 281.18ms. Allocated memory is still 385.9MB. Free memory was 326.3MB in the beginning and 312.0MB in the end (delta: 14.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 69348.64ms. Allocated memory was 385.9MB in the beginning and 803.2MB in the end (delta: 417.3MB). Free memory was 311.2MB in the beginning and 306.3MB in the end (delta: 4.9MB). Peak memory consumption was 423.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was analyzing trace of length 54 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 69.3s, OverallIterations: 15, TraceHistogramMax: 5, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 638 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 638 mSDsluCounter, 754 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 579 mSDsCounter, 1817 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5379 IncrementalHoareTripleChecker+Invalid, 7196 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1817 mSolverCounterUnsat, 175 mSDtfsCounter, 5379 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1091 GetRequests, 693 SyntacticMatches, 51 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6146 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=12, InterpolantAutomatonStates: 165, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 74 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 12.1s InterpolantComputationTime, 885 NumberOfCodeBlocks, 881 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1264 ConstructedInterpolants, 5 QuantifiedInterpolants, 9399 SizeOfPredicates, 47 NumberOfNonLiveVariables, 1828 ConjunctsInSsa, 336 ConjunctsInUnsatCore, 36 InterpolantComputations, 3 PerfectInterpolantSequences, 873/1414 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown