/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-tiling/revcpyswp2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 18:42:40,149 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 18:42:40,232 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 18:42:40,236 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 18:42:40,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 18:42:40,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 18:42:40,264 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 18:42:40,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 18:42:40,265 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 18:42:40,268 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 18:42:40,268 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 18:42:40,269 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 18:42:40,269 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 18:42:40,269 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 18:42:40,270 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 18:42:40,270 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 18:42:40,270 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 18:42:40,270 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 18:42:40,270 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 18:42:40,271 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 18:42:40,271 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 18:42:40,271 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 18:42:40,271 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 18:42:40,272 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 18:42:40,272 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 18:42:40,272 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 18:42:40,272 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 18:42:40,272 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 18:42:40,273 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 18:42:40,273 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 18:42:40,274 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 18:42:40,274 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 18:42:40,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:42:40,274 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 18:42:40,275 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 18:42:40,275 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 18:42:40,275 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 18:42:40,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 18:42:40,275 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 18:42:40,275 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 18:42:40,275 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 18:42:40,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 18:42:40,276 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 18:42:40,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 18:42:40,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 18:42:40,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 18:42:40,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 18:42:40,528 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 18:42:40,529 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 18:42:40,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c [2023-12-18 18:42:41,600 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 18:42:41,788 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 18:42:41,789 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/revcpyswp2.c [2023-12-18 18:42:41,801 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9ed08cd/6c26954bb9a74107af7b80b756806bbf/FLAG886e85550 [2023-12-18 18:42:41,815 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9ed08cd/6c26954bb9a74107af7b80b756806bbf [2023-12-18 18:42:41,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 18:42:41,818 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 18:42:41,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 18:42:41,821 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 18:42:41,825 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 18:42:41,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:42:41" (1/1) ... [2023-12-18 18:42:41,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b995af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:41, skipping insertion in model container [2023-12-18 18:42:41,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:42:41" (1/1) ... [2023-12-18 18:42:41,847 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 18:42:41,966 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-tiling/revcpyswp2.c[432,445] [2023-12-18 18:42:41,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:42:41,992 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 18:42:42,004 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-tiling/revcpyswp2.c[432,445] [2023-12-18 18:42:42,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 18:42:42,034 INFO L206 MainTranslator]: Completed translation [2023-12-18 18:42:42,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42 WrapperNode [2023-12-18 18:42:42,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 18:42:42,036 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 18:42:42,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 18:42:42,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 18:42:42,043 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,068 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 111 [2023-12-18 18:42:42,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 18:42:42,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 18:42:42,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 18:42:42,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 18:42:42,082 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,085 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,096 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 2, 6, 3, 5]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 1, 3, 1, 3]. [2023-12-18 18:42:42,097 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,097 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,107 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,112 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 18:42:42,113 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 18:42:42,113 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 18:42:42,113 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 18:42:42,114 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (1/1) ... [2023-12-18 18:42:42,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 18:42:42,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:42:42,161 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) [2023-12-18 18:42:42,186 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 [2023-12-18 18:42:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 18:42:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 18:42:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 18:42:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 18:42:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-18 18:42:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-18 18:42:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 18:42:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 18:42:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 18:42:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-18 18:42:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-18 18:42:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 18:42:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 18:42:42,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 18:42:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 18:42:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 18:42:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 18:42:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-18 18:42:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-18 18:42:42,278 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 18:42:42,280 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 18:42:42,445 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 18:42:42,474 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 18:42:42,474 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-18 18:42:42,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:42:42 BoogieIcfgContainer [2023-12-18 18:42:42,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 18:42:42,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 18:42:42,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 18:42:42,479 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 18:42:42,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:42:41" (1/3) ... [2023-12-18 18:42:42,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5102ee16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:42:42, skipping insertion in model container [2023-12-18 18:42:42,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:42:42" (2/3) ... [2023-12-18 18:42:42,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5102ee16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:42:42, skipping insertion in model container [2023-12-18 18:42:42,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:42:42" (3/3) ... [2023-12-18 18:42:42,481 INFO L112 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2023-12-18 18:42:42,495 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 18:42:42,495 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 18:42:42,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 18:42:42,530 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;@14689795, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 18:42:42,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 18:42:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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) [2023-12-18 18:42:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 18:42:42,537 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:42,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:42,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:42,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash -795032890, now seen corresponding path program 1 times [2023-12-18 18:42:42,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:42,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510148795] [2023-12-18 18:42:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:42,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:42:42,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:42,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510148795] [2023-12-18 18:42:42,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510148795] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:42:42,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:42:42,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 18:42:42,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098008929] [2023-12-18 18:42:42,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:42:42,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 18:42:42,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:42,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 18:42:42,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 18:42:42,772 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-12-18 18:42:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:42,819 INFO L93 Difference]: Finished difference Result 33 states and 52 transitions. [2023-12-18 18:42:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:42:42,821 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2023-12-18 18:42:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:42,827 INFO L225 Difference]: With dead ends: 33 [2023-12-18 18:42:42,827 INFO L226 Difference]: Without dead ends: 15 [2023-12-18 18:42:42,829 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 [2023-12-18 18:42:42,833 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:42,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:42:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-18 18:42:42,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-18 18:42:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2023-12-18 18:42:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-12-18 18:42:42,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 13 [2023-12-18 18:42:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:42,853 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-12-18 18:42:42,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-12-18 18:42:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-12-18 18:42:42,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 18:42:42,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:42,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:42,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 18:42:42,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:42,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1396740672, now seen corresponding path program 1 times [2023-12-18 18:42:42,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:42,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792647233] [2023-12-18 18:42:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:42,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:42:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:42,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792647233] [2023-12-18 18:42:42,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792647233] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:42:42,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:42:42,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 18:42:42,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013394606] [2023-12-18 18:42:42,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:42:42,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 18:42:43,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:43,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 18:42:43,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 18:42:43,003 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-12-18 18:42:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:43,042 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-12-18 18:42:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 18:42:43,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2023-12-18 18:42:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:43,043 INFO L225 Difference]: With dead ends: 28 [2023-12-18 18:42:43,043 INFO L226 Difference]: Without dead ends: 16 [2023-12-18 18:42:43,044 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 [2023-12-18 18:42:43,046 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:43,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:42:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-18 18:42:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-18 18:42:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2023-12-18 18:42:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-12-18 18:42:43,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 13 [2023-12-18 18:42:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:43,054 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-12-18 18:42:43,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-12-18 18:42:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-12-18 18:42:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 18:42:43,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:43,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:43,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 18:42:43,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:43,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2041370195, now seen corresponding path program 1 times [2023-12-18 18:42:43,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:43,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501429177] [2023-12-18 18:42:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:43,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:42:43,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:43,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501429177] [2023-12-18 18:42:43,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501429177] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 18:42:43,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 18:42:43,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 18:42:43,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374358446] [2023-12-18 18:42:43,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 18:42:43,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 18:42:43,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 18:42:43,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 18:42:43,169 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-12-18 18:42:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:43,212 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-12-18 18:42:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 18:42:43,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2023-12-18 18:42:43,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:43,213 INFO L225 Difference]: With dead ends: 34 [2023-12-18 18:42:43,213 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 18:42:43,214 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 [2023-12-18 18:42:43,215 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:43,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 11 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:42:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 18:42:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2023-12-18 18:42:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2023-12-18 18:42:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-18 18:42:43,219 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2023-12-18 18:42:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:43,220 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-18 18:42:43,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-12-18 18:42:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-18 18:42:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-18 18:42:43,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:43,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:43,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 18:42:43,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:43,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1960427068, now seen corresponding path program 1 times [2023-12-18 18:42:43,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:43,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239853200] [2023-12-18 18:42:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:42:43,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:43,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239853200] [2023-12-18 18:42:43,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239853200] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:42:43,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692487343] [2023-12-18 18:42:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:43,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:42:43,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:42:43,346 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) [2023-12-18 18:42:43,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 18:42:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:43,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 18:42:43,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:42:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:42:43,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:42:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:42:43,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692487343] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:42:43,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:42:43,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-18 18:42:43,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231408474] [2023-12-18 18:42:43,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:42:43,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-18 18:42:43,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:43,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-18 18:42:43,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-18 18:42:43,528 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2023-12-18 18:42:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:43,579 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-12-18 18:42:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 18:42:43,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 17 [2023-12-18 18:42:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:43,582 INFO L225 Difference]: With dead ends: 35 [2023-12-18 18:42:43,582 INFO L226 Difference]: Without dead ends: 20 [2023-12-18 18:42:43,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-18 18:42:43,584 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:43,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:42:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-18 18:42:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-18 18:42:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2023-12-18 18:42:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-18 18:42:43,588 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 17 [2023-12-18 18:42:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:43,589 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-18 18:42:43,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2023-12-18 18:42:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-18 18:42:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 18:42:43,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:43,589 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:43,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 18:42:43,796 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 [2023-12-18 18:42:43,796 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:43,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:43,797 INFO L85 PathProgramCache]: Analyzing trace with hash 991255217, now seen corresponding path program 2 times [2023-12-18 18:42:43,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:43,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098658341] [2023-12-18 18:42:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:43,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 18:42:43,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098658341] [2023-12-18 18:42:43,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098658341] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:42:43,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061161282] [2023-12-18 18:42:43,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:42:43,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:42:43,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:42:43,964 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) [2023-12-18 18:42:43,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 18:42:44,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:42:44,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:42:44,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 18:42:44,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:42:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 18:42:44,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:42:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 18:42:44,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061161282] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:42:44,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:42:44,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-18 18:42:44,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411711095] [2023-12-18 18:42:44,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:42:44,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-18 18:42:44,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-18 18:42:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-18 18:42:44,159 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2023-12-18 18:42:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:44,229 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2023-12-18 18:42:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 18:42:44,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 [2023-12-18 18:42:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:44,248 INFO L225 Difference]: With dead ends: 45 [2023-12-18 18:42:44,248 INFO L226 Difference]: Without dead ends: 33 [2023-12-18 18:42:44,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-12-18 18:42:44,250 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:44,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 17 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:42:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-18 18:42:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2023-12-18 18:42:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-12-18 18:42:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-12-18 18:42:44,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2023-12-18 18:42:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:44,255 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-12-18 18:42:44,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2023-12-18 18:42:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-12-18 18:42:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 18:42:44,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:44,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:44,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 18:42:44,463 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 [2023-12-18 18:42:44,463 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:44,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash -303743872, now seen corresponding path program 3 times [2023-12-18 18:42:44,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:44,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621697339] [2023-12-18 18:42:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:44,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:42:46,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:46,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621697339] [2023-12-18 18:42:46,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621697339] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:42:46,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314730117] [2023-12-18 18:42:46,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:42:46,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:42:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:42:46,120 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) [2023-12-18 18:42:46,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 18:42:46,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-18 18:42:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:42:46,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-18 18:42:46,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:42:46,330 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 23 treesize of output 1 [2023-12-18 18:42:46,406 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 17 treesize of output 13 [2023-12-18 18:42:46,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-12-18 18:42:46,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:42:46,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2023-12-18 18:42:46,549 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 17 treesize of output 13 [2023-12-18 18:42:46,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:42:46,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-18 18:42:46,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-12-18 18:42:46,705 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 17 treesize of output 13 [2023-12-18 18:42:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:42:46,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-18 18:42:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:42:46,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:42:46,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-12-18 18:42:46,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 182 [2023-12-18 18:42:47,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-12-18 18:42:47,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 86 [2023-12-18 18:42:47,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2023-12-18 18:42:47,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 250 [2023-12-18 18:42:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:42:47,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314730117] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:42:47,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:42:47,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 12] total 41 [2023-12-18 18:42:47,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169416896] [2023-12-18 18:42:47,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:42:47,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-18 18:42:47,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-18 18:42:47,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 18:42:47,207 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 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) [2023-12-18 18:42:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:48,314 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2023-12-18 18:42:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-18 18:42:48,316 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 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 21 [2023-12-18 18:42:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:48,317 INFO L225 Difference]: With dead ends: 82 [2023-12-18 18:42:48,317 INFO L226 Difference]: Without dead ends: 80 [2023-12-18 18:42:48,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=673, Invalid=3883, Unknown=0, NotChecked=0, Total=4556 [2023-12-18 18:42:48,319 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 212 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:48,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 139 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 18:42:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-18 18:42:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2023-12-18 18:42:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 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) [2023-12-18 18:42:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2023-12-18 18:42:48,334 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 21 [2023-12-18 18:42:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:48,334 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2023-12-18 18:42:48,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 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) [2023-12-18 18:42:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2023-12-18 18:42:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-18 18:42:48,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:48,336 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:48,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 18:42:48,540 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 [2023-12-18 18:42:48,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:48,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash 185655223, now seen corresponding path program 4 times [2023-12-18 18:42:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:48,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21048154] [2023-12-18 18:42:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:48,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:42:48,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:48,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21048154] [2023-12-18 18:42:48,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21048154] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:42:48,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538953789] [2023-12-18 18:42:48,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:42:48,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:42:48,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:42:48,676 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) [2023-12-18 18:42:48,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 18:42:48,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:42:48,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:42:48,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 18:42:48,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:42:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:42:48,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:42:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 18:42:48,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538953789] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:42:48,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:42:48,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 18:42:48,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116505957] [2023-12-18 18:42:48,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:42:48,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 18:42:48,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:48,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 18:42:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-18 18:42:48,877 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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) [2023-12-18 18:42:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:49,071 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2023-12-18 18:42:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-18 18:42:49,074 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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) Word has length 24 [2023-12-18 18:42:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:49,074 INFO L225 Difference]: With dead ends: 101 [2023-12-18 18:42:49,075 INFO L226 Difference]: Without dead ends: 78 [2023-12-18 18:42:49,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-12-18 18:42:49,076 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 57 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:49,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 79 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:42:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-18 18:42:49,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2023-12-18 18:42:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 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) [2023-12-18 18:42:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-12-18 18:42:49,088 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 24 [2023-12-18 18:42:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:49,089 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-12-18 18:42:49,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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) [2023-12-18 18:42:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-12-18 18:42:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-18 18:42:49,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:49,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:49,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 18:42:49,296 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 [2023-12-18 18:42:49,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:49,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash 667803124, now seen corresponding path program 1 times [2023-12-18 18:42:49,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:49,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194675379] [2023-12-18 18:42:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:49,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:42:50,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194675379] [2023-12-18 18:42:50,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194675379] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:42:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371852264] [2023-12-18 18:42:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:50,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:42:50,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:42:50,311 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) [2023-12-18 18:42:50,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 18:42:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:50,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-18 18:42:50,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:42:50,553 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 11 [2023-12-18 18:42:50,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-12-18 18:42:50,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:42:50,680 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 11 [2023-12-18 18:42:50,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-18 18:42:50,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-18 18:42:50,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-18 18:42:50,788 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 11 [2023-12-18 18:42:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:42:50,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:42:51,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-12-18 18:42:51,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-18 18:42:51,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-12-18 18:42:51,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-18 18:42:51,233 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 18:42:51,233 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 37 treesize of output 20 [2023-12-18 18:42:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 18:42:51,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371852264] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:42:51,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:42:51,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 14] total 46 [2023-12-18 18:42:51,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218854209] [2023-12-18 18:42:51,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:42:51,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-18 18:42:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-18 18:42:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2023-12-18 18:42:51,269 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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) [2023-12-18 18:42:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:52,001 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2023-12-18 18:42:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-18 18:42:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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 24 [2023-12-18 18:42:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:52,003 INFO L225 Difference]: With dead ends: 90 [2023-12-18 18:42:52,003 INFO L226 Difference]: Without dead ends: 88 [2023-12-18 18:42:52,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=539, Invalid=3367, Unknown=0, NotChecked=0, Total=3906 [2023-12-18 18:42:52,006 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:52,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 154 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 18:42:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-18 18:42:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2023-12-18 18:42:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 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) [2023-12-18 18:42:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2023-12-18 18:42:52,019 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 24 [2023-12-18 18:42:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:52,020 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2023-12-18 18:42:52,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 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) [2023-12-18 18:42:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2023-12-18 18:42:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 18:42:52,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:52,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:52,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 18:42:52,226 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 [2023-12-18 18:42:52,226 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:52,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1525311100, now seen corresponding path program 5 times [2023-12-18 18:42:52,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950320494] [2023-12-18 18:42:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:52,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:42:53,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:53,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950320494] [2023-12-18 18:42:53,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950320494] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:42:53,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007998220] [2023-12-18 18:42:53,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:42:53,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:42:53,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:42:53,565 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) [2023-12-18 18:42:53,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 18:42:54,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-18 18:42:54,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:42:54,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-18 18:42:54,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:42:54,205 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 23 treesize of output 1 [2023-12-18 18:42:54,280 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 20 treesize of output 16 [2023-12-18 18:42:54,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2023-12-18 18:42:54,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:42:54,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2023-12-18 18:42:54,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:42:54,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 37 [2023-12-18 18:42:54,494 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 17 treesize of output 13 [2023-12-18 18:42:54,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-18 18:42:54,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-18 18:42:54,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-12-18 18:42:54,688 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 17 treesize of output 13 [2023-12-18 18:42:54,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-18 18:42:54,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-18 18:42:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:42:54,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:42:55,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2023-12-18 18:42:55,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 826 treesize of output 818 [2023-12-18 18:42:55,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2023-12-18 18:42:55,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 406 treesize of output 402 [2023-12-18 18:42:55,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 73 [2023-12-18 18:42:55,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 274 [2023-12-18 18:42:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 18:42:55,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007998220] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:42:55,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:42:55,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 15] total 54 [2023-12-18 18:42:55,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290790862] [2023-12-18 18:42:55,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:42:55,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-18 18:42:55,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:55,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-18 18:42:55,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2541, Unknown=0, NotChecked=0, Total=2862 [2023-12-18 18:42:55,398 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 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) [2023-12-18 18:42:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:58,278 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2023-12-18 18:42:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-18 18:42:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 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 [2023-12-18 18:42:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:58,279 INFO L225 Difference]: With dead ends: 148 [2023-12-18 18:42:58,279 INFO L226 Difference]: Without dead ends: 146 [2023-12-18 18:42:58,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3683 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1874, Invalid=11236, Unknown=0, NotChecked=0, Total=13110 [2023-12-18 18:42:58,283 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 574 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:58,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 254 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 18:42:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-18 18:42:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 45. [2023-12-18 18:42:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 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) [2023-12-18 18:42:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-12-18 18:42:58,298 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2023-12-18 18:42:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:58,299 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-12-18 18:42:58,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 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) [2023-12-18 18:42:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-12-18 18:42:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 18:42:58,304 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:58,304 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:58,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-18 18:42:58,510 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 [2023-12-18 18:42:58,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:58,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:58,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2126708039, now seen corresponding path program 2 times [2023-12-18 18:42:58,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:58,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398432443] [2023-12-18 18:42:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:42:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 18:42:58,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:42:58,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398432443] [2023-12-18 18:42:58,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398432443] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:42:58,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422159985] [2023-12-18 18:42:58,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:42:58,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:42:58,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:42:58,619 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) [2023-12-18 18:42:58,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 18:42:58,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:42:58,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:42:58,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 18:42:58,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:42:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 18:42:58,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:42:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 18:42:58,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422159985] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:42:58,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:42:58,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 18:42:58,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108735490] [2023-12-18 18:42:58,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:42:58,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 18:42:58,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:42:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 18:42:58,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-18 18:42:58,836 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2023-12-18 18:42:58,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:42:58,955 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2023-12-18 18:42:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 18:42:58,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 [2023-12-18 18:42:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:42:58,956 INFO L225 Difference]: With dead ends: 79 [2023-12-18 18:42:58,956 INFO L226 Difference]: Without dead ends: 40 [2023-12-18 18:42:58,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-18 18:42:58,957 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:42:58,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 36 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:42:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-18 18:42:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2023-12-18 18:42:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2023-12-18 18:42:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-12-18 18:42:58,967 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 25 [2023-12-18 18:42:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:42:58,967 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-12-18 18:42:58,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2023-12-18 18:42:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-12-18 18:42:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-18 18:42:58,967 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:42:58,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:42:58,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 18:42:59,173 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 [2023-12-18 18:42:59,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:42:59,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:42:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash 216412784, now seen corresponding path program 3 times [2023-12-18 18:42:59,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:42:59,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340214087] [2023-12-18 18:42:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:42:59,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:42:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:00,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:00,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340214087] [2023-12-18 18:43:00,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340214087] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:00,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364620404] [2023-12-18 18:43:00,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:43:00,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:00,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:00,812 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) [2023-12-18 18:43:00,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 18:43:01,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 18:43:01,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:01,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-18 18:43:01,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:01,302 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 19 treesize of output 15 [2023-12-18 18:43:01,351 INFO L349 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-12-18 18:43:01,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2023-12-18 18:43:01,541 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2023-12-18 18:43:01,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 52 [2023-12-18 18:43:01,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:43:01,609 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 18:43:01,610 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 50 treesize of output 34 [2023-12-18 18:43:01,614 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 19 treesize of output 15 [2023-12-18 18:43:01,636 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-12-18 18:43:01,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2023-12-18 18:43:01,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-12-18 18:43:01,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-12-18 18:43:01,831 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 [2023-12-18 18:43:01,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 18:43:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:43:02,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:02,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-12-18 18:43:02,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2023-12-18 18:43:02,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2023-12-18 18:43:02,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-12-18 18:43:02,670 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 18:43:02,670 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 31 treesize of output 20 [2023-12-18 18:43:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 18:43:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364620404] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:02,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:02,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 19] total 59 [2023-12-18 18:43:02,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524994070] [2023-12-18 18:43:02,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:02,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-18 18:43:02,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:02,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-18 18:43:02,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=3044, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 18:43:02,737 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 59 states have internal predecessors, (77), 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) [2023-12-18 18:43:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:08,936 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2023-12-18 18:43:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-18 18:43:08,936 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 59 states have internal predecessors, (77), 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 28 [2023-12-18 18:43:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:08,937 INFO L225 Difference]: With dead ends: 141 [2023-12-18 18:43:08,937 INFO L226 Difference]: Without dead ends: 139 [2023-12-18 18:43:08,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6927 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3860, Invalid=20632, Unknown=0, NotChecked=0, Total=24492 [2023-12-18 18:43:08,942 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 504 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 18:43:08,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 211 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 18:43:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-18 18:43:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 32. [2023-12-18 18:43:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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) [2023-12-18 18:43:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-12-18 18:43:08,955 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2023-12-18 18:43:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:08,955 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-12-18 18:43:08,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.305084745762712) internal successors, (77), 59 states have internal predecessors, (77), 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) [2023-12-18 18:43:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-12-18 18:43:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-18 18:43:08,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:08,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:08,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-18 18:43:09,158 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 [2023-12-18 18:43:09,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:09,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash 412738052, now seen corresponding path program 4 times [2023-12-18 18:43:09,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:09,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594973532] [2023-12-18 18:43:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:09,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:10,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:10,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594973532] [2023-12-18 18:43:10,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594973532] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:10,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334090530] [2023-12-18 18:43:10,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:43:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:10,784 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) [2023-12-18 18:43:10,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 18:43:10,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:43:10,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:10,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-18 18:43:10,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:10,992 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 22 treesize of output 18 [2023-12-18 18:43:11,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2023-12-18 18:43:11,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:43:11,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2023-12-18 18:43:11,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-12-18 18:43:11,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-12-18 18:43:11,115 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 22 treesize of output 18 [2023-12-18 18:43:11,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-12-18 18:43:11,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-12-18 18:43:11,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-12-18 18:43:11,227 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 22 treesize of output 18 [2023-12-18 18:43:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 18:43:11,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:11,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-12-18 18:43:11,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-18 18:43:11,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-12-18 18:43:11,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-18 18:43:11,459 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 18:43:11,459 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 37 treesize of output 20 [2023-12-18 18:43:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 18:43:11,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334090530] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:11,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:11,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15, 18] total 42 [2023-12-18 18:43:11,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354782874] [2023-12-18 18:43:11,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:11,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-18 18:43:11,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-18 18:43:11,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 18:43:11,464 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 42 states have internal predecessors, (66), 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) [2023-12-18 18:43:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:13,031 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-12-18 18:43:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-18 18:43:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 42 states have internal predecessors, (66), 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 31 [2023-12-18 18:43:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:13,032 INFO L225 Difference]: With dead ends: 84 [2023-12-18 18:43:13,032 INFO L226 Difference]: Without dead ends: 82 [2023-12-18 18:43:13,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1004, Invalid=6306, Unknown=0, NotChecked=0, Total=7310 [2023-12-18 18:43:13,034 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 280 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 18:43:13,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 160 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 18:43:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-18 18:43:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2023-12-18 18:43:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 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) [2023-12-18 18:43:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-12-18 18:43:13,053 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 31 [2023-12-18 18:43:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:13,054 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-12-18 18:43:13,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 42 states have internal predecessors, (66), 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) [2023-12-18 18:43:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-12-18 18:43:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-18 18:43:13,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:13,054 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:13,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:13,260 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 [2023-12-18 18:43:13,261 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:13,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:13,261 INFO L85 PathProgramCache]: Analyzing trace with hash -970106456, now seen corresponding path program 5 times [2023-12-18 18:43:13,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:13,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774769413] [2023-12-18 18:43:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:13,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-18 18:43:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774769413] [2023-12-18 18:43:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774769413] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013587919] [2023-12-18 18:43:13,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:43:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:13,403 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) [2023-12-18 18:43:13,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 18:43:14,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-18 18:43:14,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:14,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 18:43:14,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-18 18:43:14,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-18 18:43:14,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013587919] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:14,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:14,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 18:43:14,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162456992] [2023-12-18 18:43:14,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:14,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 18:43:14,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:14,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 18:43:14,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 18:43:14,727 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2023-12-18 18:43:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:14,900 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2023-12-18 18:43:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 18:43:14,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) Word has length 32 [2023-12-18 18:43:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:14,901 INFO L225 Difference]: With dead ends: 118 [2023-12-18 18:43:14,901 INFO L226 Difference]: Without dead ends: 58 [2023-12-18 18:43:14,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-18 18:43:14,901 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:43:14,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 47 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:43:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-18 18:43:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2023-12-18 18:43:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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) [2023-12-18 18:43:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-12-18 18:43:14,917 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 32 [2023-12-18 18:43:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:14,917 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-12-18 18:43:14,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2023-12-18 18:43:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-12-18 18:43:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 18:43:14,918 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:14,918 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:14,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:15,118 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 [2023-12-18 18:43:15,118 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:15,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash -701321669, now seen corresponding path program 6 times [2023-12-18 18:43:15,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:15,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384144768] [2023-12-18 18:43:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-18 18:43:15,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384144768] [2023-12-18 18:43:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384144768] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548076130] [2023-12-18 18:43:15,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:43:15,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:15,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:15,256 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) [2023-12-18 18:43:15,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 18:43:15,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-18 18:43:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:15,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 18:43:15,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-18 18:43:15,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-18 18:43:15,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548076130] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:15,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:15,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 18:43:15,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412873039] [2023-12-18 18:43:15,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:15,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 18:43:15,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:15,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 18:43:15,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 18:43:15,915 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2023-12-18 18:43:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:16,060 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-12-18 18:43:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 18:43:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) Word has length 34 [2023-12-18 18:43:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:16,061 INFO L225 Difference]: With dead ends: 58 [2023-12-18 18:43:16,061 INFO L226 Difference]: Without dead ends: 47 [2023-12-18 18:43:16,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-12-18 18:43:16,062 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 78 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:43:16,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 44 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:43:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-18 18:43:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2023-12-18 18:43:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 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) [2023-12-18 18:43:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-12-18 18:43:16,074 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 34 [2023-12-18 18:43:16,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:16,074 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-12-18 18:43:16,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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) [2023-12-18 18:43:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-12-18 18:43:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 18:43:16,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:16,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:16,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:16,276 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 [2023-12-18 18:43:16,276 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:16,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash -799755712, now seen corresponding path program 7 times [2023-12-18 18:43:16,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:16,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980100031] [2023-12-18 18:43:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:16,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:18,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:18,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980100031] [2023-12-18 18:43:18,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980100031] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:18,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064104585] [2023-12-18 18:43:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:43:18,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:18,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:18,223 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) [2023-12-18 18:43:18,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 18:43:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:18,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-18 18:43:18,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:18,680 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 11 [2023-12-18 18:43:18,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-12-18 18:43:18,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:18,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2023-12-18 18:43:18,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:43:18,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:18,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2023-12-18 18:43:18,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:43:18,979 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 11 [2023-12-18 18:43:18,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:18,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2023-12-18 18:43:19,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-18 18:43:19,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-18 18:43:19,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-18 18:43:19,235 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 11 [2023-12-18 18:43:19,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-18 18:43:19,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:19,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-12-18 18:43:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:19,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:19,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-12-18 18:43:19,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 182 [2023-12-18 18:43:19,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-12-18 18:43:19,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2023-12-18 18:43:20,149 INFO L349 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2023-12-18 18:43:20,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 31 [2023-12-18 18:43:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-18 18:43:20,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064104585] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:20,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:20,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 21] total 73 [2023-12-18 18:43:20,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956668462] [2023-12-18 18:43:20,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:20,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-18 18:43:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-18 18:43:20,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4767, Unknown=0, NotChecked=0, Total=5256 [2023-12-18 18:43:20,252 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 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) [2023-12-18 18:43:23,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:23,737 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2023-12-18 18:43:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-18 18:43:23,738 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 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 35 [2023-12-18 18:43:23,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:23,738 INFO L225 Difference]: With dead ends: 113 [2023-12-18 18:43:23,738 INFO L226 Difference]: Without dead ends: 111 [2023-12-18 18:43:23,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6049 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2100, Invalid=17922, Unknown=0, NotChecked=0, Total=20022 [2023-12-18 18:43:23,741 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 419 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 18:43:23,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 226 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 18:43:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-18 18:43:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 60. [2023-12-18 18:43:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 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) [2023-12-18 18:43:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-12-18 18:43:23,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 35 [2023-12-18 18:43:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:23,772 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-12-18 18:43:23,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 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) [2023-12-18 18:43:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-12-18 18:43:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 18:43:23,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:23,773 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:23,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-18 18:43:23,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 18:43:23,980 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:23,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:23,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1256418525, now seen corresponding path program 8 times [2023-12-18 18:43:23,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:23,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272992788] [2023-12-18 18:43:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:23,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-18 18:43:24,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:24,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272992788] [2023-12-18 18:43:24,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272992788] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:24,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221924259] [2023-12-18 18:43:24,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:43:24,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:24,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:24,169 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:43:24,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 18:43:24,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:43:24,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:24,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 18:43:24,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-18 18:43:24,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-18 18:43:24,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221924259] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:43:24,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:43:24,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-18 18:43:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545302144] [2023-12-18 18:43:24,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:43:24,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 18:43:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:43:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 18:43:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-18 18:43:24,518 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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) [2023-12-18 18:43:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:43:24,800 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2023-12-18 18:43:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 18:43:24,800 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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 37 [2023-12-18 18:43:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:43:24,801 INFO L225 Difference]: With dead ends: 148 [2023-12-18 18:43:24,801 INFO L226 Difference]: Without dead ends: 114 [2023-12-18 18:43:24,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2023-12-18 18:43:24,802 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:43:24,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 105 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:43:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-18 18:43:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2023-12-18 18:43:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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) [2023-12-18 18:43:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-12-18 18:43:24,836 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 37 [2023-12-18 18:43:24,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:43:24,836 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-12-18 18:43:24,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 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) [2023-12-18 18:43:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-12-18 18:43:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 18:43:24,837 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:43:24,837 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:43:24,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 18:43:25,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-18 18:43:25,044 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:43:25,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:43:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1333424076, now seen corresponding path program 9 times [2023-12-18 18:43:25,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:43:25,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843368637] [2023-12-18 18:43:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:43:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:43:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:43:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:43:26,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:43:26,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843368637] [2023-12-18 18:43:26,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843368637] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:43:26,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139279390] [2023-12-18 18:43:26,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:43:26,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:43:26,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:43:26,759 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:43:26,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 18:43:27,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 18:43:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:43:27,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 84 conjunts are in the unsatisfiable core [2023-12-18 18:43:27,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:43:27,337 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 [2023-12-18 18:43:27,451 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 21 treesize of output 17 [2023-12-18 18:43:27,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-18 18:43:27,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:27,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-12-18 18:43:27,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-18 18:43:27,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 18:43:27,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-12-18 18:43:27,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-18 18:43:27,618 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-12-18 18:43:27,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 18:43:27,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:27,658 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 33 treesize of output 31 [2023-12-18 18:43:27,662 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 23 treesize of output 1 [2023-12-18 18:43:27,773 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 18:43:27,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2023-12-18 18:43:27,826 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 18:43:27,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2023-12-18 18:43:27,885 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 18:43:27,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2023-12-18 18:43:27,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 18:43:27,907 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 35 treesize of output 29 [2023-12-18 18:43:27,911 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 19 treesize of output 1 [2023-12-18 18:43:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:43:28,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:43:28,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-12-18 18:43:28,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-18 18:44:25,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2023-12-18 18:44:25,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 558 treesize of output 550 [2023-12-18 18:44:25,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2023-12-18 18:44:25,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-12-18 18:44:25,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2023-12-18 18:45:30,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-12-18 18:45:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 18:45:30,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139279390] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:45:30,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:45:30,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 28] total 75 [2023-12-18 18:45:30,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256453236] [2023-12-18 18:45:30,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:45:30,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-18 18:45:30,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:45:30,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-18 18:45:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=4611, Unknown=29, NotChecked=0, Total=5550 [2023-12-18 18:45:30,361 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 75 states, 75 states have (on average 1.32) internal successors, (99), 75 states have internal predecessors, (99), 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) [2023-12-18 18:47:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:47:22,724 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2023-12-18 18:47:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-12-18 18:47:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.32) internal successors, (99), 75 states have internal predecessors, (99), 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 38 [2023-12-18 18:47:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:47:22,725 INFO L225 Difference]: With dead ends: 182 [2023-12-18 18:47:22,725 INFO L226 Difference]: Without dead ends: 154 [2023-12-18 18:47:22,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6095 ImplicationChecksByTransitivity, 234.2s TimeCoverageRelationStatistics Valid=3754, Invalid=16496, Unknown=56, NotChecked=0, Total=20306 [2023-12-18 18:47:22,727 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 395 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:47:22,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 465 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-18 18:47:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-18 18:47:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 86. [2023-12-18 18:47:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 85 states have internal predecessors, (98), 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) [2023-12-18 18:47:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2023-12-18 18:47:22,766 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 38 [2023-12-18 18:47:22,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:47:22,766 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2023-12-18 18:47:22,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.32) internal successors, (99), 75 states have internal predecessors, (99), 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) [2023-12-18 18:47:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2023-12-18 18:47:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 18:47:22,767 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:47:22,767 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:47:22,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 18:47:22,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:47:22,970 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:47:22,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:47:22,970 INFO L85 PathProgramCache]: Analyzing trace with hash 169904580, now seen corresponding path program 10 times [2023-12-18 18:47:22,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:47:22,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029313205] [2023-12-18 18:47:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:47:22,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:47:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:47:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:47:25,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:47:25,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029313205] [2023-12-18 18:47:25,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029313205] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:47:25,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662124674] [2023-12-18 18:47:25,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:47:25,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:47:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:47:25,512 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:47:25,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 18:47:25,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:47:25,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:47:25,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-18 18:47:25,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:47:25,808 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 22 treesize of output 18 [2023-12-18 18:47:25,841 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-12-18 18:47:25,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2023-12-18 18:47:25,906 INFO L349 Elim1Store]: treesize reduction 70, result has 23.1 percent of original size [2023-12-18 18:47:25,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 71 [2023-12-18 18:47:26,067 INFO L349 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2023-12-18 18:47:26,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 85 [2023-12-18 18:47:26,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:47:26,150 INFO L349 Elim1Store]: treesize reduction 76, result has 23.2 percent of original size [2023-12-18 18:47:26,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 89 [2023-12-18 18:47:26,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2023-12-18 18:47:26,218 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-18 18:47:26,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 56 [2023-12-18 18:47:26,221 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 22 treesize of output 18 [2023-12-18 18:47:26,261 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 18:47:26,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2023-12-18 18:47:26,302 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 18:47:26,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2023-12-18 18:47:26,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-12-18 18:47:26,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-12-18 18:47:26,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-12-18 18:47:26,452 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 22 treesize of output 18 [2023-12-18 18:47:26,464 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 18:47:26,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2023-12-18 18:47:26,505 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-18 18:47:26,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2023-12-18 18:47:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:47:26,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:47:26,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-12-18 18:47:26,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-12-18 18:47:27,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-12-18 18:47:27,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-12-18 18:47:31,355 INFO L349 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-12-18 18:47:31,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 30 [2023-12-18 18:47:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-18 18:47:31,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662124674] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:47:31,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:47:31,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24, 23] total 62 [2023-12-18 18:47:31,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173896437] [2023-12-18 18:47:31,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:47:31,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-18 18:47:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:47:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-18 18:47:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=3490, Unknown=0, NotChecked=0, Total=3782 [2023-12-18 18:47:31,360 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 62 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 62 states have internal predecessors, (92), 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) [2023-12-18 18:47:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:47:34,994 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2023-12-18 18:47:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-18 18:47:34,995 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 62 states have internal predecessors, (92), 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 [2023-12-18 18:47:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:47:34,995 INFO L225 Difference]: With dead ends: 126 [2023-12-18 18:47:34,995 INFO L226 Difference]: Without dead ends: 124 [2023-12-18 18:47:34,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1054, Invalid=9866, Unknown=0, NotChecked=0, Total=10920 [2023-12-18 18:47:34,997 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 180 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 140 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-18 18:47:34,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 534 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2434 Invalid, 2 Unknown, 0 Unchecked, 1.9s Time] [2023-12-18 18:47:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-18 18:47:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 83. [2023-12-18 18:47:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.146341463414634) internal successors, (94), 82 states have internal predecessors, (94), 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) [2023-12-18 18:47:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-12-18 18:47:35,050 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 39 [2023-12-18 18:47:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:47:35,050 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-12-18 18:47:35,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 62 states have internal predecessors, (92), 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) [2023-12-18 18:47:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-12-18 18:47:35,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 18:47:35,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:47:35,051 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:47:35,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 18:47:35,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 18:47:35,258 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:47:35,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:47:35,259 INFO L85 PathProgramCache]: Analyzing trace with hash -380321580, now seen corresponding path program 11 times [2023-12-18 18:47:35,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:47:35,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380558790] [2023-12-18 18:47:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:47:35,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:47:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:47:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-18 18:47:35,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:47:35,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380558790] [2023-12-18 18:47:35,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380558790] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:47:35,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900367090] [2023-12-18 18:47:35,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:47:35,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:47:35,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:47:35,444 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:47:35,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 18:49:28,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 18:49:28,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:49:28,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 18:49:28,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:49:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 18:49:28,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:49:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 18:49:28,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900367090] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:49:28,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:49:28,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2023-12-18 18:49:28,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036207846] [2023-12-18 18:49:28,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:49:28,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-18 18:49:28,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:49:28,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-18 18:49:28,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-12-18 18:49:28,471 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2023-12-18 18:49:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:49:28,680 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2023-12-18 18:49:28,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 18:49:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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 [2023-12-18 18:49:28,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:49:28,681 INFO L225 Difference]: With dead ends: 124 [2023-12-18 18:49:28,681 INFO L226 Difference]: Without dead ends: 54 [2023-12-18 18:49:28,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2023-12-18 18:49:28,682 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:49:28,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 52 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:49:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-18 18:49:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2023-12-18 18:49:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 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) [2023-12-18 18:49:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-12-18 18:49:28,700 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 40 [2023-12-18 18:49:28,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:49:28,700 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-12-18 18:49:28,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 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) [2023-12-18 18:49:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-12-18 18:49:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-18 18:49:28,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:49:28,701 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:49:28,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-18 18:49:28,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:49:28,901 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:49:28,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:49:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2133698000, now seen corresponding path program 12 times [2023-12-18 18:49:28,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:49:28,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165050893] [2023-12-18 18:49:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:49:28,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:49:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:49:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:49:31,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:49:31,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165050893] [2023-12-18 18:49:31,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165050893] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:49:31,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578506950] [2023-12-18 18:49:31,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 18:49:31,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:49:31,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:49:31,275 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:49:31,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 18:49:31,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 18:49:31,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:49:31,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-18 18:49:31,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:49:32,112 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 19 treesize of output 15 [2023-12-18 18:49:32,159 INFO L349 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-12-18 18:49:32,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2023-12-18 18:49:33,229 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2023-12-18 18:49:33,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 52 [2023-12-18 18:49:33,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:49:33,301 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2023-12-18 18:49:33,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 56 [2023-12-18 18:49:33,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:49:33,366 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2023-12-18 18:49:33,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 59 [2023-12-18 18:49:33,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:49:33,443 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 18:49:33,443 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 56 treesize of output 40 [2023-12-18 18:49:33,448 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 19 treesize of output 15 [2023-12-18 18:49:33,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 18:49:33,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-18 18:49:33,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-18 18:49:33,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-18 18:49:33,809 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 11 [2023-12-18 18:49:33,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-18 18:49:33,867 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-12-18 18:49:33,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 18:49:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 18:49:34,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:49:34,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-12-18 18:49:34,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2023-12-18 18:49:34,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-12-18 18:49:34,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 182 [2023-12-18 18:49:34,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-12-18 18:49:35,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-12-18 18:49:35,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2023-12-18 18:49:35,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2023-12-18 18:49:35,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-12-18 18:49:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:49:35,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578506950] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:49:35,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:49:35,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 28] total 87 [2023-12-18 18:49:35,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703455362] [2023-12-18 18:49:35,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:49:35,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-12-18 18:49:35,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:49:35,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-12-18 18:49:35,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=6717, Unknown=2, NotChecked=0, Total=7482 [2023-12-18 18:49:35,414 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 87 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 87 states have internal predecessors, (117), 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) [2023-12-18 18:50:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:50:56,923 INFO L93 Difference]: Finished difference Result 207 states and 227 transitions. [2023-12-18 18:50:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-12-18 18:50:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 87 states have internal predecessors, (117), 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 42 [2023-12-18 18:50:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:50:56,926 INFO L225 Difference]: With dead ends: 207 [2023-12-18 18:50:56,926 INFO L226 Difference]: Without dead ends: 205 [2023-12-18 18:50:56,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14537 ImplicationChecksByTransitivity, 71.2s TimeCoverageRelationStatistics Valid=5990, Invalid=39492, Unknown=100, NotChecked=0, Total=45582 [2023-12-18 18:50:56,929 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 772 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 415 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-12-18 18:50:56,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 494 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1878 Invalid, 21 Unknown, 0 Unchecked, 13.5s Time] [2023-12-18 18:50:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-12-18 18:50:56,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 58. [2023-12-18 18:50:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 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) [2023-12-18 18:50:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2023-12-18 18:50:56,966 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 42 [2023-12-18 18:50:56,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:50:56,966 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2023-12-18 18:50:56,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 87 states have internal predecessors, (117), 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) [2023-12-18 18:50:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2023-12-18 18:50:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 18:50:56,967 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:50:56,967 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:50:56,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-18 18:50:57,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:50:57,168 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:50:57,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:50:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1616842160, now seen corresponding path program 13 times [2023-12-18 18:50:57,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:50:57,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225294130] [2023-12-18 18:50:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:50:57,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:50:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:50:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 18:50:57,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:50:57,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225294130] [2023-12-18 18:50:57,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225294130] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:50:57,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289978896] [2023-12-18 18:50:57,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 18:50:57,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:50:57,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:50:57,371 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:50:57,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 18:50:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:50:57,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 18:50:57,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:50:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-18 18:50:57,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:50:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-18 18:50:57,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289978896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:50:57,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:50:57,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2023-12-18 18:50:57,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747189075] [2023-12-18 18:50:57,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:50:57,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-18 18:50:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:50:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-18 18:50:57,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-12-18 18:50:57,822 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 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) [2023-12-18 18:50:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:50:58,080 INFO L93 Difference]: Finished difference Result 186 states and 209 transitions. [2023-12-18 18:50:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 18:50:58,080 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 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 44 [2023-12-18 18:50:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:50:58,081 INFO L225 Difference]: With dead ends: 186 [2023-12-18 18:50:58,081 INFO L226 Difference]: Without dead ends: 140 [2023-12-18 18:50:58,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2023-12-18 18:50:58,082 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:50:58,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 73 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:50:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-18 18:50:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2023-12-18 18:50:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 108 states have internal predecessors, (122), 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) [2023-12-18 18:50:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2023-12-18 18:50:58,151 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 44 [2023-12-18 18:50:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:50:58,152 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2023-12-18 18:50:58,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 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) [2023-12-18 18:50:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2023-12-18 18:50:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-18 18:50:58,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:50:58,152 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:50:58,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-18 18:50:58,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:50:58,353 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:50:58,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:50:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash 524264004, now seen corresponding path program 14 times [2023-12-18 18:50:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:50:58,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472296931] [2023-12-18 18:50:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:50:58,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:50:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:51:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:51:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472296931] [2023-12-18 18:51:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472296931] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:51:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285481412] [2023-12-18 18:51:00,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 18:51:00,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:51:00,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:51:00,761 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:51:00,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 18:51:00,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 18:51:00,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:51:00,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 100 conjunts are in the unsatisfiable core [2023-12-18 18:51:00,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:51:01,364 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 19 treesize of output 15 [2023-12-18 18:51:01,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2023-12-18 18:51:01,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:51:01,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2023-12-18 18:51:01,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:51:01,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2023-12-18 18:51:01,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:51:01,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2023-12-18 18:51:01,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 18:51:01,672 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 11 [2023-12-18 18:51:01,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-18 18:51:01,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 18:51:01,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 18:51:01,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 18:51:01,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 18:51:01,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2023-12-18 18:51:01,979 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 19 treesize of output 15 [2023-12-18 18:51:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 18:51:02,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:51:02,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-12-18 18:51:02,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-18 18:51:02,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-12-18 18:51:02,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-18 18:51:03,234 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-18 18:51:03,234 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 37 treesize of output 20 [2023-12-18 18:51:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 18:51:03,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285481412] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:51:03,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:51:03,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 26] total 90 [2023-12-18 18:51:03,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821234490] [2023-12-18 18:51:03,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:51:03,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-12-18 18:51:03,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:51:03,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-12-18 18:51:03,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=7430, Unknown=0, NotChecked=0, Total=8010 [2023-12-18 18:51:03,431 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 90 states, 90 states have (on average 1.4) internal successors, (126), 90 states have internal predecessors, (126), 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) [2023-12-18 18:51:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:51:07,392 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2023-12-18 18:51:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-18 18:51:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.4) internal successors, (126), 90 states have internal predecessors, (126), 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 45 [2023-12-18 18:51:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:51:07,394 INFO L225 Difference]: With dead ends: 157 [2023-12-18 18:51:07,394 INFO L226 Difference]: Without dead ends: 112 [2023-12-18 18:51:07,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7387 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2043, Invalid=21213, Unknown=0, NotChecked=0, Total=23256 [2023-12-18 18:51:07,400 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 407 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:51:07,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 395 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-18 18:51:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-18 18:51:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2023-12-18 18:51:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 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) [2023-12-18 18:51:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-12-18 18:51:07,459 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 45 [2023-12-18 18:51:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:51:07,459 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-12-18 18:51:07,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.4) internal successors, (126), 90 states have internal predecessors, (126), 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) [2023-12-18 18:51:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-12-18 18:51:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 18:51:07,460 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:51:07,460 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:51:07,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 18:51:07,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:51:07,660 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:51:07,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:51:07,661 INFO L85 PathProgramCache]: Analyzing trace with hash -149295485, now seen corresponding path program 15 times [2023-12-18 18:51:07,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:51:07,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693395156] [2023-12-18 18:51:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:51:07,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:51:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:51:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-18 18:51:07,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:51:07,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693395156] [2023-12-18 18:51:07,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693395156] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:51:07,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250593211] [2023-12-18 18:51:07,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 18:51:07,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:51:07,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:51:07,871 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:51:07,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 18:51:08,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 18:51:08,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:51:08,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 18:51:08,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:51:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-18 18:51:08,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:51:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-18 18:51:08,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250593211] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:51:08,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:51:08,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 18:51:08,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361409556] [2023-12-18 18:51:08,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:51:08,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 18:51:08,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:51:08,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 18:51:08,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-18 18:51:08,837 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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) [2023-12-18 18:51:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:51:09,067 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2023-12-18 18:51:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 18:51:09,067 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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 46 [2023-12-18 18:51:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:51:09,068 INFO L225 Difference]: With dead ends: 114 [2023-12-18 18:51:09,068 INFO L226 Difference]: Without dead ends: 85 [2023-12-18 18:51:09,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2023-12-18 18:51:09,069 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 18:51:09,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 82 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 18:51:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-18 18:51:09,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2023-12-18 18:51:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 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) [2023-12-18 18:51:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2023-12-18 18:51:09,104 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 46 [2023-12-18 18:51:09,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:51:09,104 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2023-12-18 18:51:09,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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) [2023-12-18 18:51:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2023-12-18 18:51:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-18 18:51:09,104 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:51:09,105 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:51:09,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-18 18:51:09,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-18 18:51:09,305 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:51:09,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:51:09,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1908181686, now seen corresponding path program 16 times [2023-12-18 18:51:09,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:51:09,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153783825] [2023-12-18 18:51:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:51:09,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:51:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:51:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-18 18:51:09,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:51:09,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153783825] [2023-12-18 18:51:09,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153783825] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:51:09,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651077779] [2023-12-18 18:51:09,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 18:51:09,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:51:09,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:51:09,538 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:51:09,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-18 18:51:09,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 18:51:09,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 18:51:09,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 18:51:09,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 18:51:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-18 18:51:09,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 18:51:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-18 18:51:10,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651077779] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 18:51:10,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 18:51:10,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 18:51:10,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905353316] [2023-12-18 18:51:10,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 18:51:10,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 18:51:10,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:51:10,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 18:51:10,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-18 18:51:10,040 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 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) [2023-12-18 18:51:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 18:51:10,342 INFO L93 Difference]: Finished difference Result 181 states and 198 transitions. [2023-12-18 18:51:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 18:51:10,342 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 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 [2023-12-18 18:51:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 18:51:10,343 INFO L225 Difference]: With dead ends: 181 [2023-12-18 18:51:10,343 INFO L226 Difference]: Without dead ends: 134 [2023-12-18 18:51:10,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 73 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 18:51:10,344 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 18:51:10,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 107 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 18:51:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-18 18:51:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 105. [2023-12-18 18:51:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1057692307692308) internal successors, (115), 104 states have internal predecessors, (115), 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) [2023-12-18 18:51:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2023-12-18 18:51:10,405 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 47 [2023-12-18 18:51:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 18:51:10,406 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2023-12-18 18:51:10,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 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) [2023-12-18 18:51:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2023-12-18 18:51:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 18:51:10,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 18:51:10,406 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 18:51:10,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-18 18:51:10,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-18 18:51:10,607 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 18:51:10,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 18:51:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1413459101, now seen corresponding path program 17 times [2023-12-18 18:51:10,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 18:51:10,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005445374] [2023-12-18 18:51:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 18:51:10,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 18:51:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 18:51:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-18 18:51:10,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 18:51:10,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005445374] [2023-12-18 18:51:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005445374] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 18:51:10,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532558433] [2023-12-18 18:51:10,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 18:51:10,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 18:51:10,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 18:51:10,857 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 18:51:10,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process Received shutdown request... [2023-12-18 18:56:58,547 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 18:56:58,547 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 [2023-12-18 18:56:59,629 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 0 [2023-12-18 18:56:59,748 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forcibly destroying the process [2023-12-18 18:56:59,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 137 [2023-12-18 18:56:59,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 18:56:59,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-18 18:56:59,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-18 18:56:59,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536404822] [2023-12-18 18:56:59,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-18 18:56:59,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 18:56:59,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 18:56:59,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 18:56:59,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-12-18 18:56:59,779 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2023-12-18 18:56:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 18:56:59,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-12-18 18:56:59,780 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 18:56:59,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 18:56:59,782 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 18:56:59,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-18 18:56:59,783 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (105states) and FLOYD_HOARE automaton (currently 2 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-18 18:56:59,786 INFO L445 BasicCegarLoop]: Path program histogram: [17, 5, 1, 1, 1] [2023-12-18 18:56:59,788 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 18:56:59,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 06:56:59 BoogieIcfgContainer [2023-12-18 18:56:59,789 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 18:56:59,789 INFO L158 Benchmark]: Toolchain (without parser) took 857971.29ms. Allocated memory was 182.5MB in the beginning and 487.6MB in the end (delta: 305.1MB). Free memory was 137.0MB in the beginning and 387.2MB in the end (delta: -250.2MB). Peak memory consumption was 56.5MB. Max. memory is 8.0GB. [2023-12-18 18:56:59,789 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory is still 139.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 18:56:59,790 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.58ms. Allocated memory is still 182.5MB. Free memory was 136.7MB in the beginning and 125.1MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 18:56:59,790 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.08ms. Allocated memory is still 182.5MB. Free memory was 125.1MB in the beginning and 123.4MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 18:56:59,790 INFO L158 Benchmark]: Boogie Preprocessor took 43.04ms. Allocated memory is still 182.5MB. Free memory was 123.4MB in the beginning and 121.0MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-18 18:56:59,790 INFO L158 Benchmark]: RCFGBuilder took 361.44ms. Allocated memory is still 182.5MB. Free memory was 121.0MB in the beginning and 105.2MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-18 18:56:59,790 INFO L158 Benchmark]: TraceAbstraction took 857312.89ms. Allocated memory was 182.5MB in the beginning and 487.6MB in the end (delta: 305.1MB). Free memory was 104.6MB in the beginning and 387.2MB in the end (delta: -282.6MB). Peak memory consumption was 24.0MB. Max. memory is 8.0GB. [2023-12-18 18:56:59,791 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 182.5MB. Free memory is still 139.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 214.58ms. Allocated memory is still 182.5MB. Free memory was 136.7MB in the beginning and 125.1MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.08ms. Allocated memory is still 182.5MB. Free memory was 125.1MB in the beginning and 123.4MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.04ms. Allocated memory is still 182.5MB. Free memory was 123.4MB in the beginning and 121.0MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 361.44ms. Allocated memory is still 182.5MB. Free memory was 121.0MB in the beginning and 105.2MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 857312.89ms. Allocated memory was 182.5MB in the beginning and 487.6MB in the end (delta: 305.1MB). Free memory was 104.6MB in the beginning and 387.2MB in the end (delta: -282.6MB). Peak memory consumption was 24.0MB. 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: 9]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 9). Cancelled while NwaCegarLoop was constructing difference of abstraction (105states) and FLOYD_HOARE automaton (currently 2 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 857.3s, OverallIterations: 25, TraceHistogramMax: 7, PathProgramHistogramMax: 17, EmptinessCheckTime: 0.0s, AutomataDifference: 219.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 mSolverCounterUnknown, 4683 SdHoareTripleChecker+Valid, 22.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4683 mSDsluCounter, 3736 SdHoareTripleChecker+Invalid, 20.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3359 mSDsCounter, 3547 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14828 IncrementalHoareTripleChecker+Invalid, 18398 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3547 mSolverCounterUnsat, 377 mSDtfsCounter, 14828 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2445 GetRequests, 884 SyntacticMatches, 88 SemanticMatches, 1473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55393 ImplicationChecksByTransitivity, 339.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=21, InterpolantAutomatonStates: 859, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 24 MinimizatonAttempts, 859 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 117.3s SatisfiabilityAnalysisTime, 163.1s InterpolantComputationTime, 1473 NumberOfCodeBlocks, 1447 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 2098 ConstructedInterpolants, 35 QuantifiedInterpolants, 22246 SizeOfPredicates, 307 NumberOfNonLiveVariables, 5903 ConjunctsInSsa, 872 ConjunctsInUnsatCore, 67 InterpolantComputations, 3 PerfectInterpolantSequences, 1484/3061 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