/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/recursified_loop-simple/recursified_nested_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 23:02:39,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 23:02:39,143 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 23:02:39,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 23:02:39,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 23:02:39,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 23:02:39,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 23:02:39,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 23:02:39,171 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 23:02:39,174 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 23:02:39,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 23:02:39,174 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 23:02:39,175 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 23:02:39,175 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 23:02:39,176 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 23:02:39,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 23:02:39,176 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 23:02:39,176 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 23:02:39,176 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 23:02:39,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 23:02:39,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 23:02:39,177 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 23:02:39,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 23:02:39,177 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 23:02:39,177 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 23:02:39,177 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 23:02:39,178 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 23:02:39,178 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 23:02:39,178 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 23:02:39,178 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 23:02:39,179 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 23:02:39,179 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 23:02:39,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:02:39,179 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 23:02:39,179 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 23:02:39,180 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 23:02:39,180 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 23:02:39,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 23:02:39,180 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 23:02:39,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 23:02:39,180 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 23:02:39,180 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 23:02:39,180 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 23:02:39,181 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 23:02:39,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 23:02:39,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 23:02:39,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 23:02:39,397 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 23:02:39,397 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 23:02:39,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_loop-simple/recursified_nested_2.c [2023-12-15 23:02:40,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 23:02:40,616 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 23:02:40,617 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_nested_2.c [2023-12-15 23:02:40,622 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/664db578e/cef128684b4d4dd8ac4e2aedc4a06ffc/FLAGfa572c5ce [2023-12-15 23:02:40,637 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/664db578e/cef128684b4d4dd8ac4e2aedc4a06ffc [2023-12-15 23:02:40,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 23:02:40,639 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 23:02:40,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 23:02:40,642 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 23:02:40,645 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 23:02:40,645 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2132b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40, skipping insertion in model container [2023-12-15 23:02:40,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,661 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 23:02:40,776 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_nested_2.c[1611,1624] [2023-12-15 23:02:40,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:02:40,787 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 23:02:40,799 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_loop-simple/recursified_nested_2.c[1611,1624] [2023-12-15 23:02:40,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:02:40,808 INFO L206 MainTranslator]: Completed translation [2023-12-15 23:02:40,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40 WrapperNode [2023-12-15 23:02:40,808 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 23:02:40,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 23:02:40,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 23:02:40,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 23:02:40,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,819 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,830 INFO L138 Inliner]: procedures = 13, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2023-12-15 23:02:40,830 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 23:02:40,830 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 23:02:40,831 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 23:02:40,831 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 23:02:40,837 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,844 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,853 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 1, 1]. The 4 writes are split as follows [0, 2, 2]. [2023-12-15 23:02:40,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,863 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,864 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,864 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 23:02:40,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 23:02:40,866 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 23:02:40,866 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 23:02:40,867 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (1/1) ... [2023-12-15 23:02:40,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:02:40,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:40,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 23:02:40,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 23:02:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 23:02:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 23:02:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 23:02:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-15 23:02:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 23:02:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 23:02:40,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 23:02:40,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-15 23:02:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_20_to_21_0 [2023-12-15 23:02:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_20_to_21_0 [2023-12-15 23:02:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 23:02:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 23:02:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 23:02:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 23:02:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-15 23:02:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_21_to_21_0 [2023-12-15 23:02:40,911 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_21_to_21_0 [2023-12-15 23:02:40,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 23:02:40,960 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 23:02:40,961 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 23:02:41,048 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 23:02:41,063 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 23:02:41,063 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-15 23:02:41,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:02:41 BoogieIcfgContainer [2023-12-15 23:02:41,063 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 23:02:41,065 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 23:02:41,065 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 23:02:41,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 23:02:41,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:02:40" (1/3) ... [2023-12-15 23:02:41,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcac0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:02:41, skipping insertion in model container [2023-12-15 23:02:41,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:02:40" (2/3) ... [2023-12-15 23:02:41,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcac0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:02:41, skipping insertion in model container [2023-12-15 23:02:41,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:02:41" (3/3) ... [2023-12-15 23:02:41,068 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_2.c [2023-12-15 23:02:41,080 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 23:02:41,080 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 23:02:41,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 23:02:41,113 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;@2f2bdab0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 23:02:41,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 23:02:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-15 23:02:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-15 23:02:41,148 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:41,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:02:41,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:41,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash 855928239, now seen corresponding path program 1 times [2023-12-15 23:02:41,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:41,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188152531] [2023-12-15 23:02:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:41,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:41,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:02:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 23:02:41,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:41,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188152531] [2023-12-15 23:02:41,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188152531] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:02:41,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:02:41,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 23:02:41,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355698804] [2023-12-15 23:02:41,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:02:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 23:02:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:41,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 23:02:41,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 23:02:41,544 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 23:02:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:41,670 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-12-15 23:02:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 23:02:41,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-15 23:02:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:41,678 INFO L225 Difference]: With dead ends: 32 [2023-12-15 23:02:41,678 INFO L226 Difference]: Without dead ends: 23 [2023-12-15 23:02:41,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-15 23:02:41,683 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:41,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:02:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-15 23:02:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-12-15 23:02:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-15 23:02:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-15 23:02:41,713 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2023-12-15 23:02:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:41,714 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-15 23:02:41,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-15 23:02:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-15 23:02:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-15 23:02:41,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:41,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:02:41,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 23:02:41,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:41,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash 255373073, now seen corresponding path program 1 times [2023-12-15 23:02:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:41,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810343511] [2023-12-15 23:02:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:41,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:41,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:02:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:41,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:42,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-15 23:02:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 23:02:42,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:42,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810343511] [2023-12-15 23:02:42,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810343511] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:02:42,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:02:42,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 23:02:42,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288672859] [2023-12-15 23:02:42,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:02:42,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 23:02:42,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:42,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 23:02:42,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-15 23:02:42,032 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 23:02:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:42,116 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-12-15 23:02:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-15 23:02:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2023-12-15 23:02:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:42,117 INFO L225 Difference]: With dead ends: 42 [2023-12-15 23:02:42,118 INFO L226 Difference]: Without dead ends: 23 [2023-12-15 23:02:42,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-15 23:02:42,120 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:42,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:02:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-15 23:02:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-15 23:02:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-15 23:02:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-12-15 23:02:42,128 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 21 [2023-12-15 23:02:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:42,129 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-12-15 23:02:42,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-15 23:02:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-12-15 23:02:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 23:02:42,131 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:42,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:02:42,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 23:02:42,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:42,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1037516303, now seen corresponding path program 1 times [2023-12-15 23:02:42,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:42,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473652411] [2023-12-15 23:02:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:42,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:42,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:02:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:42,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:42,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:42,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-15 23:02:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 23:02:42,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473652411] [2023-12-15 23:02:42,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473652411] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:42,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792552313] [2023-12-15 23:02:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:42,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:42,546 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:02:42,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 23:02:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:42,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-15 23:02:42,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:02:42,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 23:02:42,797 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 36 treesize of output 13 [2023-12-15 23:02:42,828 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 7 [2023-12-15 23:02:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 23:02:42,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:02:42,980 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 7 treesize of output 3 [2023-12-15 23:02:43,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792552313] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:43,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 23:02:43,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-12-15 23:02:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654745098] [2023-12-15 23:02:43,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 23:02:43,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-15 23:02:43,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:43,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-15 23:02:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-12-15 23:02:43,107 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-15 23:02:43,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:43,301 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2023-12-15 23:02:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 23:02:43,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 26 [2023-12-15 23:02:43,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:43,302 INFO L225 Difference]: With dead ends: 54 [2023-12-15 23:02:43,302 INFO L226 Difference]: Without dead ends: 33 [2023-12-15 23:02:43,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2023-12-15 23:02:43,303 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:43,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:02:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-15 23:02:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-12-15 23:02:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-15 23:02:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-12-15 23:02:43,308 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 26 [2023-12-15 23:02:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:43,308 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-12-15 23:02:43,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-15 23:02:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-12-15 23:02:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-15 23:02:43,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:43,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:02:43,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 23:02:43,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:43,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:43,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:43,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1404341341, now seen corresponding path program 1 times [2023-12-15 23:02:43,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:43,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813890094] [2023-12-15 23:02:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:43,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:43,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:02:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:43,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:43,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:43,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:43,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-15 23:02:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-15 23:02:43,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:43,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813890094] [2023-12-15 23:02:43,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813890094] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:43,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192833964] [2023-12-15 23:02:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:43,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:43,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:43,940 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:02:43,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 23:02:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:43,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-15 23:02:43,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:02:44,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 23:02:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-15 23:02:44,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:02:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 23:02:44,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192833964] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:02:44,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:02:44,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2023-12-15 23:02:44,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326628632] [2023-12-15 23:02:44,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:02:44,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-15 23:02:44,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:44,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-15 23:02:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-12-15 23:02:44,463 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 26 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 10 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) [2023-12-15 23:02:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:44,692 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-12-15 23:02:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 23:02:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 10 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) Word has length 31 [2023-12-15 23:02:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:44,693 INFO L225 Difference]: With dead ends: 56 [2023-12-15 23:02:44,693 INFO L226 Difference]: Without dead ends: 29 [2023-12-15 23:02:44,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2023-12-15 23:02:44,694 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:44,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 100 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:02:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-15 23:02:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-15 23:02:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-15 23:02:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-12-15 23:02:44,698 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 31 [2023-12-15 23:02:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:44,698 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-12-15 23:02:44,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 10 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) [2023-12-15 23:02:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-12-15 23:02:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-15 23:02:44,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:44,699 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:02:44,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 23:02:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-15 23:02:44,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:44,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1464884653, now seen corresponding path program 2 times [2023-12-15 23:02:44,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:44,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421870326] [2023-12-15 23:02:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:02:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-15 23:02:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-15 23:02:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 75 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-15 23:02:45,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:45,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421870326] [2023-12-15 23:02:45,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421870326] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:45,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787695467] [2023-12-15 23:02:45,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 23:02:45,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:45,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:02:45,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 23:02:45,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 23:02:45,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:02:45,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-15 23:02:45,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:02:45,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 23:02:46,111 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 36 treesize of output 13 [2023-12-15 23:02:46,129 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 7 [2023-12-15 23:02:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2023-12-15 23:02:46,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:02:46,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787695467] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:46,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 23:02:46,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-12-15 23:02:46,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043071655] [2023-12-15 23:02:46,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 23:02:46,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-15 23:02:46,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-15 23:02:46,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-12-15 23:02:46,397 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 20 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 8 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2023-12-15 23:02:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:46,599 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2023-12-15 23:02:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 23:02:46,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 8 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) Word has length 62 [2023-12-15 23:02:46,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:46,601 INFO L225 Difference]: With dead ends: 66 [2023-12-15 23:02:46,601 INFO L226 Difference]: Without dead ends: 39 [2023-12-15 23:02:46,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 23:02:46,602 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:46,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 54 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:02:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-15 23:02:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-12-15 23:02:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 9 states have return successors, (12), 10 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-15 23:02:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-12-15 23:02:46,606 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 62 [2023-12-15 23:02:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:46,607 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-12-15 23:02:46,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 8 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2023-12-15 23:02:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-12-15 23:02:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-15 23:02:46,608 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:46,608 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:02:46,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 23:02:46,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:46,813 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:46,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:46,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1958163257, now seen corresponding path program 2 times [2023-12-15 23:02:46,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:46,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602864919] [2023-12-15 23:02:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:02:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-15 23:02:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-15 23:02:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 10 proven. 118 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-15 23:02:47,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602864919] [2023-12-15 23:02:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602864919] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899708181] [2023-12-15 23:02:47,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 23:02:47,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:47,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:47,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:02:47,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 23:02:47,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 23:02:47,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:02:47,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-15 23:02:47,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:02:47,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 23:02:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 121 proven. 24 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-15 23:02:48,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:02:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 4 proven. 165 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-15 23:02:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899708181] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:02:49,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:02:49,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 22] total 39 [2023-12-15 23:02:49,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824549448] [2023-12-15 23:02:49,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:02:49,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-15 23:02:49,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:02:49,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-15 23:02:49,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1206, Unknown=0, NotChecked=0, Total=1482 [2023-12-15 23:02:49,752 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 39 states, 29 states have (on average 2.0) internal successors, (58), 32 states have internal predecessors, (58), 12 states have call successors, (23), 9 states have call predecessors, (23), 13 states have return successors, (23), 11 states have call predecessors, (23), 12 states have call successors, (23) [2023-12-15 23:02:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:02:50,028 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2023-12-15 23:02:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 23:02:50,028 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 2.0) internal successors, (58), 32 states have internal predecessors, (58), 12 states have call successors, (23), 9 states have call predecessors, (23), 13 states have return successors, (23), 11 states have call predecessors, (23), 12 states have call successors, (23) Word has length 72 [2023-12-15 23:02:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:02:50,031 INFO L225 Difference]: With dead ends: 72 [2023-12-15 23:02:50,031 INFO L226 Difference]: Without dead ends: 39 [2023-12-15 23:02:50,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=432, Invalid=1730, Unknown=0, NotChecked=0, Total=2162 [2023-12-15 23:02:50,034 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:02:50,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 195 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:02:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-15 23:02:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-15 23:02:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 11 states have return successors, (14), 12 states have call predecessors, (14), 4 states have call successors, (14) [2023-12-15 23:02:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-12-15 23:02:50,048 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 72 [2023-12-15 23:02:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:02:50,049 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-12-15 23:02:50,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 2.0) internal successors, (58), 32 states have internal predecessors, (58), 12 states have call successors, (23), 9 states have call predecessors, (23), 13 states have return successors, (23), 11 states have call predecessors, (23), 12 states have call successors, (23) [2023-12-15 23:02:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-12-15 23:02:50,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-15 23:02:50,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:02:50,053 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:02:50,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 23:02:50,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:50,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:02:50,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:02:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash -369709383, now seen corresponding path program 3 times [2023-12-15 23:02:50,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:02:50,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269054553] [2023-12-15 23:02:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:02:50,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:02:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:02:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:02:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:50,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:51,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:51,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:51,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:51,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:51,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:51,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:02:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:51,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:02:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:02:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-12-15 23:02:51,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:02:51,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269054553] [2023-12-15 23:02:51,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269054553] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:02:51,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133330643] [2023-12-15 23:02:51,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 23:02:51,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:02:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:02:51,062 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:02:51,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 23:02:51,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 23:02:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:02:51,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-15 23:02:51,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:02:51,333 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 36 treesize of output 13 [2023-12-15 23:02:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 238 proven. 6 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-12-15 23:02:51,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:02:51,784 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-15 23:02:51,784 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 44 treesize of output 32 [2023-12-15 23:03:05,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133330643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:03:05,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 23:03:05,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2023-12-15 23:03:05,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435245592] [2023-12-15 23:03:05,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 23:03:05,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-15 23:03:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-15 23:03:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=932, Unknown=4, NotChecked=0, Total=1056 [2023-12-15 23:03:05,298 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 11 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-15 23:03:07,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 23:03:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:07,811 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2023-12-15 23:03:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-15 23:03:07,812 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 11 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 92 [2023-12-15 23:03:07,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:07,813 INFO L225 Difference]: With dead ends: 46 [2023-12-15 23:03:07,813 INFO L226 Difference]: Without dead ends: 39 [2023-12-15 23:03:07,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=271, Invalid=1795, Unknown=4, NotChecked=0, Total=2070 [2023-12-15 23:03:07,814 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:07,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 78 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 349 Invalid, 2 Unknown, 0 Unchecked, 2.3s Time] [2023-12-15 23:03:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-15 23:03:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-15 23:03:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 11 states have return successors, (13), 11 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-15 23:03:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-12-15 23:03:07,818 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 92 [2023-12-15 23:03:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:07,818 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-12-15 23:03:07,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 11 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-15 23:03:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-12-15 23:03:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-15 23:03:07,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:07,819 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 18, 18, 18, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:07,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 23:03:08,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:08,027 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:08,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:08,027 INFO L85 PathProgramCache]: Analyzing trace with hash -149039543, now seen corresponding path program 3 times [2023-12-15 23:03:08,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:08,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303650816] [2023-12-15 23:03:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:08,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:03:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2023-12-15 23:03:09,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:09,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303650816] [2023-12-15 23:03:09,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303650816] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:03:09,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842128302] [2023-12-15 23:03:09,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 23:03:09,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:09,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:03:09,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 23:03:09,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-15 23:03:09,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:03:09,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-15 23:03:09,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:09,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 23:03:09,905 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 36 treesize of output 13 [2023-12-15 23:03:09,923 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 7 [2023-12-15 23:03:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2023-12-15 23:03:09,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:03:10,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842128302] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:03:10,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 23:03:10,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2023-12-15 23:03:10,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975272433] [2023-12-15 23:03:10,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 23:03:10,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 23:03:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 23:03:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2023-12-15 23:03:10,344 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 24 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 20 states have internal predecessors, (33), 10 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-15 23:03:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:10,473 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-12-15 23:03:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 23:03:10,474 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 20 states have internal predecessors, (33), 10 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 133 [2023-12-15 23:03:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:10,480 INFO L225 Difference]: With dead ends: 50 [2023-12-15 23:03:10,480 INFO L226 Difference]: Without dead ends: 43 [2023-12-15 23:03:10,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2023-12-15 23:03:10,481 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:10,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:03:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-15 23:03:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-12-15 23:03:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 13 states have return successors, (15), 13 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-15 23:03:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-12-15 23:03:10,487 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 133 [2023-12-15 23:03:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:10,487 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-12-15 23:03:10,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 20 states have internal predecessors, (33), 10 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-15 23:03:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-12-15 23:03:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-12-15 23:03:10,489 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:10,489 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 30, 30, 30, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:10,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 23:03:10,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:10,698 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:10,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1394731601, now seen corresponding path program 4 times [2023-12-15 23:03:10,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:10,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070033035] [2023-12-15 23:03:10,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:10,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:11,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:03:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:12,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:12,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:12,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:12,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:12,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:12,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:12,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:13,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:14,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:14,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:14,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:14,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:14,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2905 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 2854 trivial. 0 not checked. [2023-12-15 23:03:14,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:14,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070033035] [2023-12-15 23:03:14,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070033035] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:03:14,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113353281] [2023-12-15 23:03:14,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 23:03:14,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:14,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:14,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:03:14,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 23:03:14,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 23:03:14,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:03:14,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 136 conjunts are in the unsatisfiable core [2023-12-15 23:03:14,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:14,350 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 11 treesize of output 7 [2023-12-15 23:03:14,577 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 19 treesize of output 11 [2023-12-15 23:03:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2905 backedges. 937 proven. 76 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2023-12-15 23:03:14,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:03:15,469 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 25 treesize of output 21 [2023-12-15 23:03:15,757 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 25 treesize of output 21 [2023-12-15 23:03:16,047 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 25 treesize of output 21 [2023-12-15 23:03:16,296 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 25 treesize of output 21 [2023-12-15 23:03:16,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113353281] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:03:16,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 23:03:16,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-12-15 23:03:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539423464] [2023-12-15 23:03:16,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 23:03:16,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-15 23:03:16,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-15 23:03:16,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2023-12-15 23:03:16,869 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 33 states, 28 states have (on average 1.75) internal successors, (49), 31 states have internal predecessors, (49), 11 states have call successors, (14), 3 states have call predecessors, (14), 15 states have return successors, (20), 18 states have call predecessors, (20), 11 states have call successors, (20) [2023-12-15 23:03:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:17,951 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2023-12-15 23:03:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-15 23:03:17,952 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 1.75) internal successors, (49), 31 states have internal predecessors, (49), 11 states have call successors, (14), 3 states have call predecessors, (14), 15 states have return successors, (20), 18 states have call predecessors, (20), 11 states have call successors, (20) Word has length 215 [2023-12-15 23:03:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:17,953 INFO L225 Difference]: With dead ends: 75 [2023-12-15 23:03:17,953 INFO L226 Difference]: Without dead ends: 51 [2023-12-15 23:03:17,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=461, Invalid=4369, Unknown=0, NotChecked=0, Total=4830 [2023-12-15 23:03:17,954 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:17,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 76 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-15 23:03:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-15 23:03:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-12-15 23:03:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 15 states have return successors, (24), 16 states have call predecessors, (24), 5 states have call successors, (24) [2023-12-15 23:03:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-12-15 23:03:17,962 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 215 [2023-12-15 23:03:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:17,962 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-12-15 23:03:17,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 1.75) internal successors, (49), 31 states have internal predecessors, (49), 11 states have call successors, (14), 3 states have call predecessors, (14), 15 states have return successors, (20), 18 states have call predecessors, (20), 11 states have call successors, (20) [2023-12-15 23:03:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-12-15 23:03:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-12-15 23:03:17,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:17,968 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 37, 37, 37, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:17,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 23:03:18,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:18,176 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:18,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:18,176 INFO L85 PathProgramCache]: Analyzing trace with hash -49860413, now seen corresponding path program 5 times [2023-12-15 23:03:18,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:18,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203787605] [2023-12-15 23:03:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:18,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:19,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:03:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:20,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:20,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:20,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:20,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:20,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:20,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-15 23:03:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-15 23:03:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-12-15 23:03:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4407 backedges. 1032 proven. 25 refuted. 0 times theorem prover too weak. 3350 trivial. 0 not checked. [2023-12-15 23:03:23,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:23,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203787605] [2023-12-15 23:03:23,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203787605] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:03:23,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653721307] [2023-12-15 23:03:23,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 23:03:23,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:23,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:23,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:03:23,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 23:03:26,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2023-12-15 23:03:26,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:03:26,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-15 23:03:26,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:26,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-15 23:03:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4407 backedges. 1273 proven. 26 refuted. 0 times theorem prover too weak. 3108 trivial. 0 not checked. [2023-12-15 23:03:27,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:03:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4407 backedges. 1273 proven. 77 refuted. 0 times theorem prover too weak. 3057 trivial. 0 not checked. [2023-12-15 23:03:31,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653721307] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:03:31,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:03:31,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 30] total 42 [2023-12-15 23:03:31,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496646183] [2023-12-15 23:03:31,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:03:31,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-15 23:03:31,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-15 23:03:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2023-12-15 23:03:31,520 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 42 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 33 states have internal predecessors, (53), 15 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (28), 10 states have call predecessors, (28), 15 states have call successors, (28) [2023-12-15 23:03:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:31,937 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2023-12-15 23:03:31,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-15 23:03:31,938 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 33 states have internal predecessors, (53), 15 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (28), 10 states have call predecessors, (28), 15 states have call successors, (28) Word has length 261 [2023-12-15 23:03:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:31,939 INFO L225 Difference]: With dead ends: 86 [2023-12-15 23:03:31,939 INFO L226 Difference]: Without dead ends: 0 [2023-12-15 23:03:31,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 595 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=641, Invalid=2329, Unknown=0, NotChecked=0, Total=2970 [2023-12-15 23:03:31,940 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:31,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 50 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:03:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-15 23:03:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-15 23:03:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 23:03:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-15 23:03:31,941 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 261 [2023-12-15 23:03:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:31,941 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-15 23:03:31,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 33 states have internal predecessors, (53), 15 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (28), 10 states have call predecessors, (28), 15 states have call successors, (28) [2023-12-15 23:03:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-15 23:03:31,941 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-15 23:03:31,943 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 23:03:31,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-15 23:03:32,144 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,SelfDestructingSolverStorable9 [2023-12-15 23:03:32,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-15 23:03:36,350 INFO L895 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (or (not (= (select (select |old(#memory_int#1)| |func_to_recursive_line_20_to_21_0_#in~b.base|) |func_to_recursive_line_20_to_21_0_#in~b.offset|) 6)) (let ((.cse0 (select (select |#memory_int#1| |func_to_recursive_line_21_to_21_0_#in~b.base|) |func_to_recursive_line_21_to_21_0_#in~b.offset|)) (.cse1 (select (select |old(#memory_int#1)| |func_to_recursive_line_21_to_21_0_#in~b.base|) |func_to_recursive_line_21_to_21_0_#in~b.offset|))) (and (or (< .cse0 4) (< 3 .cse1)) (= func_to_recursive_line_20_to_21_0_~a.base |func_to_recursive_line_20_to_21_0_#in~a.base|) (or (< 0 (+ .cse0 1)) (< .cse1 0)) (= |func_to_recursive_line_20_to_21_0_#in~a.offset| func_to_recursive_line_20_to_21_0_~a.offset) (<= (select (select |#memory_int#2| func_to_recursive_line_20_to_21_0_~a.base) func_to_recursive_line_20_to_21_0_~a.offset) 5) (or (< 4 .cse1) (< .cse0 5)) (or (< 2 .cse1) (< .cse0 3)) (= |#memory_int#2| |old(#memory_int#2)|) (or (< .cse0 6) (< 5 .cse1)) (= |func_to_recursive_line_20_to_21_0_#in~b.offset| func_to_recursive_line_20_to_21_0_~b.offset) (= (select (select |#memory_int#1| func_to_recursive_line_20_to_21_0_~b.base) func_to_recursive_line_20_to_21_0_~b.offset) 0) (or (< .cse0 2) (< 1 .cse1)) (= func_to_recursive_line_20_to_21_0_~b.base |func_to_recursive_line_20_to_21_0_#in~b.base|)))) [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point L47-1(line 47) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 39 57) the Hoare annotation is: (or (not (= (select (select |old(#memory_int#1)| |func_to_recursive_line_20_to_21_0_#in~b.base|) |func_to_recursive_line_20_to_21_0_#in~b.offset|) 6)) (and (= |#memory_int#2| |old(#memory_int#2)|) (= |#memory_int#1| |old(#memory_int#1)|))) [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point L41(lines 41 56) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point L41-1(lines 39 57) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (or (let ((.cse0 (select (select |#memory_int#2| func_to_recursive_line_20_to_21_0_~a.base) func_to_recursive_line_20_to_21_0_~a.offset))) (and (= func_to_recursive_line_20_to_21_0_~a.base |func_to_recursive_line_20_to_21_0_#in~a.base|) (= 6 (select (select |#memory_int#1| |func_to_recursive_line_20_to_21_0_#in~b.base|) |func_to_recursive_line_20_to_21_0_#in~b.offset|)) (or (< 0 (+ (select (select |#memory_int#1| |func_to_recursive_line_21_to_21_0_#in~b.base|) |func_to_recursive_line_21_to_21_0_#in~b.offset|) 1)) (< (select (select |old(#memory_int#1)| |func_to_recursive_line_21_to_21_0_#in~b.base|) |func_to_recursive_line_21_to_21_0_#in~b.offset|) 0)) (<= .cse0 6) (= |func_to_recursive_line_20_to_21_0_#in~a.offset| func_to_recursive_line_20_to_21_0_~a.offset) (= |#memory_int#2| (store |old(#memory_int#2)| func_to_recursive_line_20_to_21_0_~a.base (store (select |old(#memory_int#2)| func_to_recursive_line_20_to_21_0_~a.base) func_to_recursive_line_20_to_21_0_~a.offset .cse0))) (= |func_to_recursive_line_20_to_21_0_#in~b.offset| func_to_recursive_line_20_to_21_0_~b.offset) (<= (select (select |#memory_int#2| |func_to_recursive_line_20_to_21_0_#in~a.base|) |func_to_recursive_line_20_to_21_0_#in~a.offset|) (+ (select (select |old(#memory_int#2)| |func_to_recursive_line_20_to_21_0_#in~a.base|) |func_to_recursive_line_20_to_21_0_#in~a.offset|) 1)) (= func_to_recursive_line_20_to_21_0_~b.base |func_to_recursive_line_20_to_21_0_#in~b.base|))) (not (= (select (select |old(#memory_int#1)| |func_to_recursive_line_20_to_21_0_#in~b.base|) |func_to_recursive_line_20_to_21_0_#in~b.offset|) 6))) [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point func_to_recursive_line_20_to_21_0EXIT(lines 39 57) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L895 garLoopResultBuilder]: At program point L65(line 65) the Hoare annotation is: (and (= (select (select |#memory_int#1| |ULTIMATE.start_main_~#b~0#1.base|) |ULTIMATE.start_main_~#b~0#1.offset|) 6) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= (select (select |#memory_int#2| |ULTIMATE.start_main_~#a~0#1.base|) 0) 0)) [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point L67-2(lines 67 73) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point L65-1(line 65) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point L67-4(lines 67 73) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 69) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-15 23:03:36,351 INFO L899 garLoopResultBuilder]: For program point L69(line 69) no Hoare annotation was computed. [2023-12-15 23:03:36,352 INFO L899 garLoopResultBuilder]: For program point L67(line 67) no Hoare annotation was computed. [2023-12-15 23:03:36,352 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (or (forall ((|v_func_to_recursive_line_20_to_21_0_#in~a.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_20_to_21_0_#in~a.base_BEFORE_CALL_14| Int)) (< 5 (select (select |#memory_int#2| |v_func_to_recursive_line_20_to_21_0_#in~a.base_BEFORE_CALL_14|) |v_func_to_recursive_line_20_to_21_0_#in~a.offset_BEFORE_CALL_14|))) (let ((.cse1 (select |old(#memory_int#1)| func_to_recursive_line_21_to_21_0_~b.base))) (let ((.cse0 (select .cse1 func_to_recursive_line_21_to_21_0_~b.offset))) (and (<= .cse0 5) (= |#memory_int#1| (store |old(#memory_int#1)| func_to_recursive_line_21_to_21_0_~b.base (store .cse1 func_to_recursive_line_21_to_21_0_~b.offset (+ .cse0 1)))) (= |func_to_recursive_line_21_to_21_0_#in~b.offset| func_to_recursive_line_21_to_21_0_~b.offset) (= func_to_recursive_line_21_to_21_0_~b.base |func_to_recursive_line_21_to_21_0_#in~b.base|))))) [2023-12-15 23:03:36,352 INFO L899 garLoopResultBuilder]: For program point func_to_recursive_line_21_to_21_0EXIT(lines 23 37) no Hoare annotation was computed. [2023-12-15 23:03:36,353 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 23 37) the Hoare annotation is: (or (= |#memory_int#1| |old(#memory_int#1)|) (forall ((|v_func_to_recursive_line_20_to_21_0_#in~a.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_20_to_21_0_#in~a.base_BEFORE_CALL_14| Int)) (< 5 (select (select |#memory_int#2| |v_func_to_recursive_line_20_to_21_0_#in~a.base_BEFORE_CALL_14|) |v_func_to_recursive_line_20_to_21_0_#in~a.offset_BEFORE_CALL_14|)))) [2023-12-15 23:03:36,353 INFO L899 garLoopResultBuilder]: For program point L25(lines 25 36) no Hoare annotation was computed. [2023-12-15 23:03:36,353 INFO L899 garLoopResultBuilder]: For program point L25-1(lines 23 37) no Hoare annotation was computed. [2023-12-15 23:03:36,370 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 1, 1] [2023-12-15 23:03:36,371 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 23:03:36,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:03:36 BoogieIcfgContainer [2023-12-15 23:03:36,377 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 23:03:36,377 INFO L158 Benchmark]: Toolchain (without parser) took 55737.69ms. Allocated memory was 287.3MB in the beginning and 859.8MB in the end (delta: 572.5MB). Free memory was 233.9MB in the beginning and 602.6MB in the end (delta: -368.7MB). Peak memory consumption was 205.0MB. Max. memory is 8.0GB. [2023-12-15 23:03:36,377 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 239.1MB. Free memory is still 190.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 23:03:36,378 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.08ms. Allocated memory is still 287.3MB. Free memory was 233.7MB in the beginning and 223.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 23:03:36,378 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.85ms. Allocated memory is still 287.3MB. Free memory was 223.2MB in the beginning and 221.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 23:03:36,380 INFO L158 Benchmark]: Boogie Preprocessor took 35.19ms. Allocated memory is still 287.3MB. Free memory was 221.7MB in the beginning and 219.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 23:03:36,380 INFO L158 Benchmark]: RCFGBuilder took 197.15ms. Allocated memory is still 287.3MB. Free memory was 219.6MB in the beginning and 207.5MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 23:03:36,380 INFO L158 Benchmark]: TraceAbstraction took 55312.07ms. Allocated memory was 287.3MB in the beginning and 859.8MB in the end (delta: 572.5MB). Free memory was 206.7MB in the beginning and 602.6MB in the end (delta: -395.9MB). Peak memory consumption was 177.7MB. Max. memory is 8.0GB. [2023-12-15 23:03:36,381 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 239.1MB. Free memory is still 190.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 167.08ms. Allocated memory is still 287.3MB. Free memory was 233.7MB in the beginning and 223.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.85ms. Allocated memory is still 287.3MB. Free memory was 223.2MB in the beginning and 221.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.19ms. Allocated memory is still 287.3MB. Free memory was 221.7MB in the beginning and 219.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 197.15ms. Allocated memory is still 287.3MB. Free memory was 219.6MB in the beginning and 207.5MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 55312.07ms. Allocated memory was 287.3MB in the beginning and 859.8MB in the end (delta: 572.5MB). Free memory was 206.7MB in the beginning and 602.6MB in the end (delta: -395.9MB). Peak memory consumption was 177.7MB. 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 - PositiveResult [Line: 69]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 55.3s, OverallIterations: 10, TraceHistogramMax: 43, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 324 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 322 mSDsluCounter, 748 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 652 mSDsCounter, 203 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2409 IncrementalHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 203 mSolverCounterUnsat, 96 mSDtfsCounter, 2409 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1876 GetRequests, 1519 SyntacticMatches, 13 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 17.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=9, InterpolantAutomatonStates: 164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 58 PreInvPairs, 60 NumberOfFragments, 298 HoareAnnotationTreeSize, 58 FormulaSimplifications, 148 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FormulaSimplificationsInter, 327 FormulaSimplificationTreeSizeReductionInter, 4.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 39.4s InterpolantComputationTime, 1815 NumberOfCodeBlocks, 1674 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 2158 ConstructedInterpolants, 34 QuantifiedInterpolants, 8037 SizeOfPredicates, 95 NumberOfNonLiveVariables, 3267 ConjunctsInSsa, 475 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 22298/22997 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-15 23:03:36,403 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 Received shutdown request...