/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-fpi/ifeqn3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 10:18:37,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 10:18:37,473 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 10:18:37,476 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 10:18:37,476 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 10:18:37,492 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 10:18:37,493 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 10:18:37,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 10:18:37,493 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 10:18:37,497 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 10:18:37,497 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 10:18:37,497 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 10:18:37,498 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 10:18:37,499 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 10:18:37,499 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 10:18:37,499 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 10:18:37,499 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 10:18:37,500 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 10:18:37,500 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 10:18:37,500 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 10:18:37,500 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 10:18:37,501 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 10:18:37,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 10:18:37,501 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 10:18:37,501 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 10:18:37,501 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 10:18:37,502 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 10:18:37,502 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 10:18:37,502 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 10:18:37,502 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 10:18:37,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 10:18:37,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 10:18:37,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:18:37,504 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 10:18:37,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 10:18:37,504 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 10:18:37,504 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 10:18:37,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 10:18:37,504 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 10:18:37,504 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 10:18:37,505 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 10:18:37,505 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 10:18:37,505 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 10:18:37,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 10:18:37,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 10:18:37,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 10:18:37,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 10:18:37,707 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 10:18:37,707 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 10:18:37,708 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3.c [2023-12-20 10:18:38,735 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 10:18:38,881 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 10:18:38,882 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3.c [2023-12-20 10:18:38,888 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/888251b0b/cc0571a42cde4870b744fa22c3b42524/FLAG709d47147 [2023-12-20 10:18:38,902 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/888251b0b/cc0571a42cde4870b744fa22c3b42524 [2023-12-20 10:18:38,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 10:18:38,905 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 10:18:38,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 10:18:38,908 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 10:18:38,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 10:18:38,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:18:38" (1/1) ... [2023-12-20 10:18:38,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96b97d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:38, skipping insertion in model container [2023-12-20 10:18:38,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:18:38" (1/1) ... [2023-12-20 10:18:38,933 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 10:18:39,050 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3.c[589,602] [2023-12-20 10:18:39,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:18:39,073 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 10:18:39,082 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3.c[589,602] [2023-12-20 10:18:39,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:18:39,100 INFO L206 MainTranslator]: Completed translation [2023-12-20 10:18:39,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39 WrapperNode [2023-12-20 10:18:39,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 10:18:39,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 10:18:39,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 10:18:39,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 10:18:39,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,113 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,132 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-12-20 10:18:39,132 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 10:18:39,133 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 10:18:39,133 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 10:18:39,133 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 10:18:39,141 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,143 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,153 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2023-12-20 10:18:39,153 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,153 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,161 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,162 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,162 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,164 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 10:18:39,165 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 10:18:39,165 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 10:18:39,165 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 10:18:39,166 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (1/1) ... [2023-12-20 10:18:39,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:18:39,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:39,197 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) [2023-12-20 10:18:39,212 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 [2023-12-20 10:18:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 10:18:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 10:18:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 10:18:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 10:18:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 10:18:39,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 10:18:39,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 10:18:39,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 10:18:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 10:18:39,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 10:18:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 10:18:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 10:18:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 10:18:39,328 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 10:18:39,331 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 10:18:39,480 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 10:18:39,497 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 10:18:39,497 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 10:18:39,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:18:39 BoogieIcfgContainer [2023-12-20 10:18:39,498 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 10:18:39,500 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 10:18:39,500 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 10:18:39,503 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 10:18:39,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 10:18:38" (1/3) ... [2023-12-20 10:18:39,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d9cae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:18:39, skipping insertion in model container [2023-12-20 10:18:39,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:18:39" (2/3) ... [2023-12-20 10:18:39,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d9cae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:18:39, skipping insertion in model container [2023-12-20 10:18:39,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:18:39" (3/3) ... [2023-12-20 10:18:39,505 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn3.c [2023-12-20 10:18:39,517 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 10:18:39,517 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 10:18:39,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 10:18:39,564 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;@7196e291, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 10:18:39,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 10:18:39,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:39,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-20 10:18:39,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:39,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:39,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:39,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:39,588 INFO L85 PathProgramCache]: Analyzing trace with hash 323884275, now seen corresponding path program 1 times [2023-12-20 10:18:39,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:39,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599967912] [2023-12-20 10:18:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:39,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:39,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599967912] [2023-12-20 10:18:39,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 10:18:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082429634] [2023-12-20 10:18:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:39,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:39,784 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) [2023-12-20 10:18:39,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 10:18:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:39,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-20 10:18:39,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:39,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:18:39,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082429634] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:18:39,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:18:39,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 10:18:39,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257560468] [2023-12-20 10:18:39,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:18:39,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 10:18:39,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 10:18:39,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:18:39,945 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-12-20 10:18:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:39,964 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2023-12-20 10:18:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 10:18:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-20 10:18:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:39,973 INFO L225 Difference]: With dead ends: 37 [2023-12-20 10:18:39,973 INFO L226 Difference]: Without dead ends: 17 [2023-12-20 10:18:39,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:18:39,979 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:39,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:18:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-20 10:18:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-20 10:18:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-12-20 10:18:40,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-20 10:18:40,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2023-12-20 10:18:40,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:40,012 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-20 10:18:40,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-12-20 10:18:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-20 10:18:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-20 10:18:40,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:40,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:40,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:40,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-20 10:18:40,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:40,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 993783914, now seen corresponding path program 1 times [2023-12-20 10:18:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:40,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096070078] [2023-12-20 10:18:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:40,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:40,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096070078] [2023-12-20 10:18:40,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 10:18:40,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875760240] [2023-12-20 10:18:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:40,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:40,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:40,262 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) [2023-12-20 10:18:40,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 10:18:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:40,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 10:18:40,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:40,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:18:40,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875760240] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:18:40,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:18:40,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 10:18:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609391419] [2023-12-20 10:18:40,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:18:40,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 10:18:40,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 10:18:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 10:18:40,390 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-12-20 10:18:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:40,453 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-12-20 10:18:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 10:18:40,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-20 10:18:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:40,455 INFO L225 Difference]: With dead ends: 38 [2023-12-20 10:18:40,456 INFO L226 Difference]: Without dead ends: 28 [2023-12-20 10:18:40,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 10:18:40,459 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:40,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:18:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-20 10:18:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2023-12-20 10:18:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-12-20 10:18:40,467 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2023-12-20 10:18:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:40,467 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-12-20 10:18:40,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-12-20 10:18:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-12-20 10:18:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-20 10:18:40,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:40,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:40,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:40,676 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,SelfDestructingSolverStorable1 [2023-12-20 10:18:40,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:40,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:40,677 INFO L85 PathProgramCache]: Analyzing trace with hash 334138833, now seen corresponding path program 1 times [2023-12-20 10:18:40,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:40,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125938022] [2023-12-20 10:18:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:40,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:40,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:40,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756195507] [2023-12-20 10:18:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:40,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:40,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:40,708 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) [2023-12-20 10:18:40,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 10:18:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:40,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 10:18:40,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:40,810 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 [2023-12-20 10:18:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:18:40,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:18:40,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125938022] [2023-12-20 10:18:40,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756195507] [2023-12-20 10:18:40,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756195507] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:18:40,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:18:40,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 10:18:40,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787604346] [2023-12-20 10:18:40,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:18:40,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 10:18:40,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:40,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 10:18:40,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 10:18:40,878 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-12-20 10:18:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:40,937 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-12-20 10:18:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 10:18:40,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-20 10:18:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:40,938 INFO L225 Difference]: With dead ends: 33 [2023-12-20 10:18:40,939 INFO L226 Difference]: Without dead ends: 31 [2023-12-20 10:18:40,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 10:18:40,940 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:40,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:18:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-20 10:18:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-12-20 10:18:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-12-20 10:18:40,946 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2023-12-20 10:18:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:40,947 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-12-20 10:18:40,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-12-20 10:18:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-12-20 10:18:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-20 10:18:40,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:40,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:40,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:41,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:41,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:41,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2109146195, now seen corresponding path program 1 times [2023-12-20 10:18:41,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:41,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259110856] [2023-12-20 10:18:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:41,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:41,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191384296] [2023-12-20 10:18:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:41,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:41,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:41,196 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) [2023-12-20 10:18:41,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 10:18:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:41,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 10:18:41,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:18:41,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 10:18:41,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:41,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259110856] [2023-12-20 10:18:41,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:41,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191384296] [2023-12-20 10:18:41,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191384296] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:18:41,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:18:41,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 10:18:41,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772303653] [2023-12-20 10:18:41,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:18:41,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 10:18:41,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 10:18:41,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 10:18:41,277 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-12-20 10:18:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:41,312 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-12-20 10:18:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 10:18:41,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-20 10:18:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:41,315 INFO L225 Difference]: With dead ends: 51 [2023-12-20 10:18:41,315 INFO L226 Difference]: Without dead ends: 32 [2023-12-20 10:18:41,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 10:18:41,321 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:41,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:18:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-20 10:18:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-12-20 10:18:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-12-20 10:18:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-12-20 10:18:41,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2023-12-20 10:18:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:41,332 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-12-20 10:18:41,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-12-20 10:18:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-12-20 10:18:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 10:18:41,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:41,333 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:41,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:41,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:41,539 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:41,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1399034495, now seen corresponding path program 1 times [2023-12-20 10:18:41,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598291310] [2023-12-20 10:18:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:41,559 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:41,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954205456] [2023-12-20 10:18:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:41,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:41,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:41,564 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) [2023-12-20 10:18:41,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 10:18:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:41,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 10:18:41,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:18:41,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:18:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:18:41,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598291310] [2023-12-20 10:18:41,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954205456] [2023-12-20 10:18:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954205456] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:18:41,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:18:41,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-20 10:18:41,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400431506] [2023-12-20 10:18:41,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:18:41,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 10:18:41,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 10:18:41,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-20 10:18:41,750 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:41,886 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-12-20 10:18:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 10:18:41,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-20 10:18:41,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:41,888 INFO L225 Difference]: With dead ends: 64 [2023-12-20 10:18:41,888 INFO L226 Difference]: Without dead ends: 39 [2023-12-20 10:18:41,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-20 10:18:41,889 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:41,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:18:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-20 10:18:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2023-12-20 10:18:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-20 10:18:41,898 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-12-20 10:18:41,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:41,898 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-20 10:18:41,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-20 10:18:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-20 10:18:41,899 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:41,900 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:41,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:42,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:42,111 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:42,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1256903054, now seen corresponding path program 1 times [2023-12-20 10:18:42,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:42,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528965321] [2023-12-20 10:18:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:42,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:42,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843047881] [2023-12-20 10:18:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:42,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:42,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:42,147 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) [2023-12-20 10:18:42,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 10:18:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:42,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-20 10:18:42,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:42,300 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 [2023-12-20 10:18:42,341 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 17 treesize of output 13 [2023-12-20 10:18:42,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 10:18:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:42,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:18:42,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:18:42,540 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 213 treesize of output 163 [2023-12-20 10:18:42,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-12-20 10:18:42,755 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 22 treesize of output 20 [2023-12-20 10:18:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:18:42,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:42,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528965321] [2023-12-20 10:18:42,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:42,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843047881] [2023-12-20 10:18:42,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843047881] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:18:42,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:18:42,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-12-20 10:18:42,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018697574] [2023-12-20 10:18:42,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:18:42,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 10:18:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 10:18:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-12-20 10:18:42,781 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:43,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:43,248 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2023-12-20 10:18:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 10:18:43,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-20 10:18:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:43,249 INFO L225 Difference]: With dead ends: 101 [2023-12-20 10:18:43,249 INFO L226 Difference]: Without dead ends: 82 [2023-12-20 10:18:43,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2023-12-20 10:18:43,250 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 109 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:43,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 78 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:18:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-20 10:18:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 38. [2023-12-20 10:18:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 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) [2023-12-20 10:18:43,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-12-20 10:18:43,257 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2023-12-20 10:18:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:43,257 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-12-20 10:18:43,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-12-20 10:18:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 10:18:43,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:43,258 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:43,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:43,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:43,464 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:43,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash 879178916, now seen corresponding path program 1 times [2023-12-20 10:18:43,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:43,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495032839] [2023-12-20 10:18:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:43,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:43,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:43,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820711613] [2023-12-20 10:18:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:43,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:43,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:43,486 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) [2023-12-20 10:18:43,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 10:18:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:18:43,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-20 10:18:43,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:43,594 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 [2023-12-20 10:18:43,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 10:18:43,673 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 [2023-12-20 10:18:43,720 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 21 treesize of output 20 [2023-12-20 10:18:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:43,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:18:44,197 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 48 treesize of output 44 [2023-12-20 10:18:44,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:18:44,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 75 treesize of output 73 [2023-12-20 10:18:44,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-12-20 10:18:44,483 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 22 treesize of output 20 [2023-12-20 10:18:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:44,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:44,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495032839] [2023-12-20 10:18:44,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:44,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820711613] [2023-12-20 10:18:44,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820711613] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:18:44,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:18:44,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-12-20 10:18:44,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545894742] [2023-12-20 10:18:44,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:18:44,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 10:18:44,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 10:18:44,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-12-20 10:18:44,524 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:49,667 INFO L93 Difference]: Finished difference Result 265 states and 304 transitions. [2023-12-20 10:18:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-20 10:18:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-20 10:18:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:49,670 INFO L225 Difference]: With dead ends: 265 [2023-12-20 10:18:49,670 INFO L226 Difference]: Without dead ends: 263 [2023-12-20 10:18:49,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1363, Invalid=5609, Unknown=0, NotChecked=0, Total=6972 [2023-12-20 10:18:49,673 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 489 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:49,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 184 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 10:18:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-12-20 10:18:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 114. [2023-12-20 10:18:49,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.3185840707964602) internal successors, (149), 113 states have internal predecessors, (149), 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) [2023-12-20 10:18:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 149 transitions. [2023-12-20 10:18:49,694 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 149 transitions. Word has length 26 [2023-12-20 10:18:49,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:49,694 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 149 transitions. [2023-12-20 10:18:49,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:18:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 149 transitions. [2023-12-20 10:18:49,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 10:18:49,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:49,695 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:49,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:49,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:49,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:49,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:49,907 INFO L85 PathProgramCache]: Analyzing trace with hash 913699278, now seen corresponding path program 2 times [2023-12-20 10:18:49,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:49,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214931562] [2023-12-20 10:18:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:49,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:49,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:49,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139467166] [2023-12-20 10:18:49,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:18:49,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:49,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:49,931 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) [2023-12-20 10:18:49,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 10:18:49,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:18:49,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:18:49,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 10:18:49,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:18:50,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:18:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:18:50,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:50,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214931562] [2023-12-20 10:18:50,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:50,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139467166] [2023-12-20 10:18:50,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139467166] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:18:50,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:18:50,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-20 10:18:50,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343110397] [2023-12-20 10:18:50,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:18:50,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 10:18:50,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 10:18:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-20 10:18:50,122 INFO L87 Difference]: Start difference. First operand 114 states and 149 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 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) [2023-12-20 10:18:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:18:50,273 INFO L93 Difference]: Finished difference Result 225 states and 281 transitions. [2023-12-20 10:18:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 10:18:50,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-20 10:18:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:18:50,274 INFO L225 Difference]: With dead ends: 225 [2023-12-20 10:18:50,274 INFO L226 Difference]: Without dead ends: 139 [2023-12-20 10:18:50,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-12-20 10:18:50,275 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:18:50,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 64 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:18:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-20 10:18:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2023-12-20 10:18:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 119 states have internal predecessors, (150), 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) [2023-12-20 10:18:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 150 transitions. [2023-12-20 10:18:50,294 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 150 transitions. Word has length 29 [2023-12-20 10:18:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:18:50,294 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 150 transitions. [2023-12-20 10:18:50,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 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) [2023-12-20 10:18:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 150 transitions. [2023-12-20 10:18:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 10:18:50,295 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:18:50,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:18:50,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 10:18:50,501 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,SelfDestructingSolverStorable7 [2023-12-20 10:18:50,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:18:50,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:18:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1445040975, now seen corresponding path program 3 times [2023-12-20 10:18:50,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:18:50,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134293041] [2023-12-20 10:18:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:18:50,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:18:50,520 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:18:50,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238027517] [2023-12-20 10:18:50,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:18:50,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:18:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:18:50,522 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:18:50,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 10:18:50,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 10:18:50,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:18:50,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-20 10:18:50,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:18:50,903 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 [2023-12-20 10:18:50,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:18:51,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:18:51,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 10:18:51,203 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 [2023-12-20 10:18:51,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:18:51,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:18:51,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:18:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:51,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:18:52,798 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 97 treesize of output 91 [2023-12-20 10:18:52,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:18:52,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 265 treesize of output 247 [2023-12-20 10:18:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:18:53,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:18:53,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134293041] [2023-12-20 10:18:53,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:18:53,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238027517] [2023-12-20 10:18:53,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238027517] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:18:53,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:18:53,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2023-12-20 10:18:53,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359811949] [2023-12-20 10:18:53,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:18:53,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-20 10:18:53,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:18:53,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-20 10:18:53,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1652, Unknown=0, NotChecked=0, Total=2070 [2023-12-20 10:18:53,345 INFO L87 Difference]: Start difference. First operand 120 states and 150 transitions. Second operand has 46 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:19:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:19:01,545 INFO L93 Difference]: Finished difference Result 307 states and 375 transitions. [2023-12-20 10:19:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-12-20 10:19:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-20 10:19:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:19:01,547 INFO L225 Difference]: With dead ends: 307 [2023-12-20 10:19:01,547 INFO L226 Difference]: Without dead ends: 171 [2023-12-20 10:19:01,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2131, Invalid=7769, Unknown=0, NotChecked=0, Total=9900 [2023-12-20 10:19:01,550 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 495 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-20 10:19:01,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 111 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-20 10:19:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-12-20 10:19:01,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 137. [2023-12-20 10:19:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.2279411764705883) internal successors, (167), 136 states have internal predecessors, (167), 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) [2023-12-20 10:19:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2023-12-20 10:19:01,582 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 35 [2023-12-20 10:19:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:19:01,583 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2023-12-20 10:19:01,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:19:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2023-12-20 10:19:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 10:19:01,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:19:01,584 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:19:01,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 10:19:01,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:19:01,785 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:19:01,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:19:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1993895340, now seen corresponding path program 4 times [2023-12-20 10:19:01,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:19:01,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558982717] [2023-12-20 10:19:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:19:01,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:19:01,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:19:01,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366249793] [2023-12-20 10:19:01,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:19:01,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:19:01,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:19:01,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:19:01,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 10:19:01,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:19:01,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:19:01,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 10:19:01,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:19:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:19:01,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:19:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:19:02,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:19:02,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558982717] [2023-12-20 10:19:02,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:19:02,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366249793] [2023-12-20 10:19:02,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366249793] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:19:02,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:19:02,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2023-12-20 10:19:02,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128969745] [2023-12-20 10:19:02,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:19:02,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 10:19:02,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:19:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 10:19:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-12-20 10:19:02,036 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:19:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:19:02,348 INFO L93 Difference]: Finished difference Result 240 states and 286 transitions. [2023-12-20 10:19:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 10:19:02,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-20 10:19:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:19:02,349 INFO L225 Difference]: With dead ends: 240 [2023-12-20 10:19:02,349 INFO L226 Difference]: Without dead ends: 118 [2023-12-20 10:19:02,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=676, Unknown=0, NotChecked=0, Total=930 [2023-12-20 10:19:02,351 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:19:02,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 110 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:19:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-20 10:19:02,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2023-12-20 10:19:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 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) [2023-12-20 10:19:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2023-12-20 10:19:02,382 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 35 [2023-12-20 10:19:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:19:02,382 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2023-12-20 10:19:02,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 10:19:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2023-12-20 10:19:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 10:19:02,383 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:19:02,383 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:19:02,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 10:19:02,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 10:19:02,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:19:02,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:19:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash -675922039, now seen corresponding path program 2 times [2023-12-20 10:19:02,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:19:02,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483354103] [2023-12-20 10:19:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:19:02,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:19:02,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:19:02,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113094149] [2023-12-20 10:19:02,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:19:02,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:19:02,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:19:02,610 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:19:02,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 10:19:02,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:19:02,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:19:02,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 10:19:02,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:19:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:19:02,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:19:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:19:02,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:19:02,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483354103] [2023-12-20 10:19:02,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:19:02,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113094149] [2023-12-20 10:19:02,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113094149] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:19:02,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:19:02,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-20 10:19:02,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409109738] [2023-12-20 10:19:02,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:19:02,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 10:19:02,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:19:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 10:19:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-20 10:19:02,863 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 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) [2023-12-20 10:19:03,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:19:03,129 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2023-12-20 10:19:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 10:19:03,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-20 10:19:03,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:19:03,130 INFO L225 Difference]: With dead ends: 133 [2023-12-20 10:19:03,130 INFO L226 Difference]: Without dead ends: 102 [2023-12-20 10:19:03,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2023-12-20 10:19:03,131 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:19:03,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 81 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:19:03,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-20 10:19:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 69. [2023-12-20 10:19:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 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) [2023-12-20 10:19:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2023-12-20 10:19:03,146 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 38 [2023-12-20 10:19:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:19:03,147 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2023-12-20 10:19:03,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 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) [2023-12-20 10:19:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2023-12-20 10:19:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-20 10:19:03,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:19:03,148 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:19:03,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 10:19:03,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 10:19:03,352 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:19:03,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:19:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash 475806958, now seen corresponding path program 5 times [2023-12-20 10:19:03,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:19:03,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396247195] [2023-12-20 10:19:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:19:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:19:03,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:19:03,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613892608] [2023-12-20 10:19:03,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:19:03,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:19:03,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:19:03,373 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:19:03,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 10:19:03,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 10:19:03,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:19:04,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-20 10:19:04,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:19:04,018 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 [2023-12-20 10:19:04,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:19:04,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:19:04,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 10:19:04,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:19:04,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 10:19:04,145 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 [2023-12-20 10:19:04,193 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 21 treesize of output 20 [2023-12-20 10:19:04,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:19:04,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-12-20 10:19:04,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:19:04,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2023-12-20 10:19:04,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:19:04,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 18 [2023-12-20 10:19:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:19:04,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:19:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:19:09,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:19:09,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396247195] [2023-12-20 10:19:09,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:19:09,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613892608] [2023-12-20 10:19:09,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613892608] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:19:09,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:19:09,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2023-12-20 10:19:09,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332161341] [2023-12-20 10:19:09,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:19:09,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 10:19:09,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:19:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 10:19:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 10:19:09,511 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 40 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 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) [2023-12-20 10:20:14,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:20:14,115 INFO L93 Difference]: Finished difference Result 267 states and 285 transitions. [2023-12-20 10:20:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-12-20 10:20:14,115 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-20 10:20:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:20:14,116 INFO L225 Difference]: With dead ends: 267 [2023-12-20 10:20:14,116 INFO L226 Difference]: Without dead ends: 265 [2023-12-20 10:20:14,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4480 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=2215, Invalid=11827, Unknown=0, NotChecked=0, Total=14042 [2023-12-20 10:20:14,120 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 991 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-12-20 10:20:14,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 341 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2023-12-20 10:20:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-12-20 10:20:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 128. [2023-12-20 10:20:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.125984251968504) internal successors, (143), 127 states have internal predecessors, (143), 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) [2023-12-20 10:20:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 143 transitions. [2023-12-20 10:20:14,165 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 143 transitions. Word has length 41 [2023-12-20 10:20:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:20:14,165 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 143 transitions. [2023-12-20 10:20:14,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 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) [2023-12-20 10:20:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 143 transitions. [2023-12-20 10:20:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 10:20:14,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:20:14,166 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:20:14,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 10:20:14,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-20 10:20:14,372 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:20:14,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:20:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1378192708, now seen corresponding path program 6 times [2023-12-20 10:20:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:20:14,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430766816] [2023-12-20 10:20:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:20:14,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:20:14,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:20:14,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025206398] [2023-12-20 10:20:14,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 10:20:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:20:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:20:14,407 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:20:14,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 10:20:15,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 10:20:15,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:20:15,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-20 10:20:15,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:20:15,102 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 [2023-12-20 10:20:15,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:20:15,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:15,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:20:15,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:15,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 10:20:15,344 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 [2023-12-20 10:20:15,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:20:15,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:15,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:20:15,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:15,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 10:20:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:20:15,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:20:17,315 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 159 treesize of output 151 [2023-12-20 10:20:17,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:17,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 749 treesize of output 699 [2023-12-20 10:20:23,810 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 229 treesize of output 211 [2023-12-20 10:20:23,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:23,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 5 [2023-12-20 10:20:23,824 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 223 treesize of output 205 [2023-12-20 10:20:23,875 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-12-20 10:20:23,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20026 treesize of output 14458 [2023-12-20 10:20:24,257 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 220 treesize of output 202 [2023-12-20 10:20:24,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:24,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37677 treesize of output 33065 [2023-12-20 10:20:34,004 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 226 treesize of output 208 [2023-12-20 10:20:34,018 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-12-20 10:20:34,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 434 treesize of output 314 [2023-12-20 10:20:34,067 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 235 treesize of output 217 [2023-12-20 10:20:34,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:34,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 5 [2023-12-20 10:20:34,084 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 232 treesize of output 214 [2023-12-20 10:20:34,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:34,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 199 treesize of output 167 [2023-12-20 10:20:34,121 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 229 treesize of output 211 [2023-12-20 10:20:34,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:34,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3926 treesize of output 3004 [2023-12-20 10:20:34,247 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 226 treesize of output 208 [2023-12-20 10:20:34,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:20:34,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259150 treesize of output 195230 [2023-12-20 10:20:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:20:35,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:20:35,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430766816] [2023-12-20 10:20:35,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:20:35,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025206398] [2023-12-20 10:20:35,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025206398] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:20:35,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:20:35,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2023-12-20 10:20:35,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506053773] [2023-12-20 10:20:35,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:20:35,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-20 10:20:35,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:20:35,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-20 10:20:35,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 10:20:35,547 INFO L87 Difference]: Start difference. First operand 128 states and 143 transitions. Second operand has 47 states, 47 states have (on average 1.8297872340425532) internal successors, (86), 47 states have internal predecessors, (86), 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) [2023-12-20 10:22:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:22:40,958 INFO L93 Difference]: Finished difference Result 282 states and 300 transitions. [2023-12-20 10:22:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-12-20 10:22:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8297872340425532) internal successors, (86), 47 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-20 10:22:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:22:40,959 INFO L225 Difference]: With dead ends: 282 [2023-12-20 10:22:40,959 INFO L226 Difference]: Without dead ends: 254 [2023-12-20 10:22:40,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5139 ImplicationChecksByTransitivity, 106.2s TimeCoverageRelationStatistics Valid=2157, Invalid=14355, Unknown=0, NotChecked=0, Total=16512 [2023-12-20 10:22:40,964 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1122 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2023-12-20 10:22:40,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 338 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 25.6s Time] [2023-12-20 10:22:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-12-20 10:22:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 117. [2023-12-20 10:22:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 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) [2023-12-20 10:22:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 135 transitions. [2023-12-20 10:22:41,008 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 135 transitions. Word has length 44 [2023-12-20 10:22:41,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:22:41,008 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 135 transitions. [2023-12-20 10:22:41,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8297872340425532) internal successors, (86), 47 states have internal predecessors, (86), 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) [2023-12-20 10:22:41,008 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 135 transitions. [2023-12-20 10:22:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 10:22:41,008 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:22:41,009 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:22:41,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 10:22:41,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 10:22:41,213 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:22:41,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:22:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2107626385, now seen corresponding path program 7 times [2023-12-20 10:22:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:22:41,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860401588] [2023-12-20 10:22:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:22:41,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:22:41,235 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:22:41,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763854648] [2023-12-20 10:22:41,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 10:22:41,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:22:41,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:22:41,237 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:22:41,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 10:22:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:22:41,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-20 10:22:41,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:22:41,986 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 [2023-12-20 10:22:42,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:22:42,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:22:42,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:22:42,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:22:42,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 10:22:42,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:22:42,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 41 [2023-12-20 10:22:42,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:22:42,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:22:42,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:22:42,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:22:42,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:22:42,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-20 10:22:42,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:22:42,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-20 10:22:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:22:43,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:22:45,875 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 234 treesize of output 224 [2023-12-20 10:22:45,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:22:45,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15526 treesize of output 14544 [2023-12-20 10:23:15,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 409 treesize of output 377 [2023-12-20 10:23:15,795 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:23:15,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4359538158 treesize of output 3194684910 [2023-12-20 10:23:59,088 WARN L293 SmtUtils]: Spent 43.27s on a formula simplification. DAG size of input: 8686 DAG size of output: 1200 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-12-20 10:32:59,241 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 10:32:59,247 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 10:32:59,255 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 10:32:59,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 10:32:59,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:32:59,456 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 54 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-40-4-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-1 context. [2023-12-20 10:32:59,460 INFO L445 BasicCegarLoop]: Path program histogram: [7, 2, 1, 1, 1, 1, 1] [2023-12-20 10:32:59,463 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 10:32:59,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 10:32:59 BoogieIcfgContainer [2023-12-20 10:32:59,464 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 10:32:59,465 INFO L158 Benchmark]: Toolchain (without parser) took 860559.70ms. Allocated memory was 188.7MB in the beginning and 974.1MB in the end (delta: 785.4MB). Free memory was 136.3MB in the beginning and 673.2MB in the end (delta: -536.8MB). Peak memory consumption was 587.5MB. Max. memory is 8.0GB. [2023-12-20 10:32:59,465 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 10:32:59,465 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.45ms. Allocated memory is still 188.7MB. Free memory was 136.0MB in the beginning and 124.8MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 10:32:59,465 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.87ms. Allocated memory is still 188.7MB. Free memory was 124.8MB in the beginning and 123.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 10:32:59,466 INFO L158 Benchmark]: Boogie Preprocessor took 31.34ms. Allocated memory is still 188.7MB. Free memory was 123.0MB in the beginning and 121.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 10:32:59,466 INFO L158 Benchmark]: RCFGBuilder took 333.15ms. Allocated memory is still 188.7MB. Free memory was 121.0MB in the beginning and 108.0MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-20 10:32:59,466 INFO L158 Benchmark]: TraceAbstraction took 859964.77ms. Allocated memory was 188.7MB in the beginning and 974.1MB in the end (delta: 785.4MB). Free memory was 107.3MB in the beginning and 673.2MB in the end (delta: -565.9MB). Peak memory consumption was 558.2MB. Max. memory is 8.0GB. [2023-12-20 10:32:59,468 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.45ms. Allocated memory is still 188.7MB. Free memory was 136.0MB in the beginning and 124.8MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.87ms. Allocated memory is still 188.7MB. Free memory was 124.8MB in the beginning and 123.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.34ms. Allocated memory is still 188.7MB. Free memory was 123.0MB in the beginning and 121.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 333.15ms. Allocated memory is still 188.7MB. Free memory was 121.0MB in the beginning and 108.0MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 859964.77ms. Allocated memory was 188.7MB in the beginning and 974.1MB in the end (delta: 785.4MB). Free memory was 107.3MB in the beginning and 673.2MB in the end (delta: -565.9MB). Peak memory consumption was 558.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 15). Cancelled while NwaCegarLoop was analyzing trace of length 54 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-40-4-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 859.9s, OverallIterations: 14, TraceHistogramMax: 5, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 205.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3630 SdHoareTripleChecker+Valid, 40.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3630 mSDsluCounter, 1440 SdHoareTripleChecker+Invalid, 39.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1255 mSDsCounter, 1201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4255 IncrementalHoareTripleChecker+Invalid, 5456 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1201 mSolverCounterUnsat, 185 mSDtfsCounter, 4255 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 948 GetRequests, 397 SyntacticMatches, 16 SemanticMatches, 535 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15345 ImplicationChecksByTransitivity, 176.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=9, InterpolantAutomatonStates: 427, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 634 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 30.8s InterpolantComputationTime, 369 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 616 ConstructedInterpolants, 25 QuantifiedInterpolants, 22580 SizeOfPredicates, 109 NumberOfNonLiveVariables, 1397 ConjunctsInSsa, 312 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 186/570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown