/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 17:51:52,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 17:51:52,404 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 17:51:52,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 17:51:52,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 17:51:52,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 17:51:52,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 17:51:52,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 17:51:52,425 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 17:51:52,425 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 17:51:52,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 17:51:52,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 17:51:52,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 17:51:52,426 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 17:51:52,426 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 17:51:52,426 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 17:51:52,427 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 17:51:52,427 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 17:51:52,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 17:51:52,427 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 17:51:52,428 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 17:51:52,430 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 17:51:52,430 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 17:51:52,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 17:51:52,434 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 17:51:52,434 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 17:51:52,434 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 17:51:52,434 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 17:51:52,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 17:51:52,435 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 17:51:52,435 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 17:51:52,435 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 17:51:52,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:51:52,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 17:51:52,436 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 17:51:52,436 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 17:51:52,436 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 17:51:52,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 17:51:52,436 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 17:51:52,437 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 17:51:52,437 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 17:51:52,437 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 17:51:52,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 17:51:52,437 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 17:51:52,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 17:51:52,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 17:51:52,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 17:51:52,689 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 17:51:52,689 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 17:51:52,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2023-12-19 17:51:53,645 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 17:51:53,796 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 17:51:53,797 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2023-12-19 17:51:53,802 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dda99f2c/5a328c0ff52a4288834381f9f98005cb/FLAG0e8ea38ce [2023-12-19 17:51:53,817 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dda99f2c/5a328c0ff52a4288834381f9f98005cb [2023-12-19 17:51:53,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 17:51:53,819 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 17:51:53,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 17:51:53,823 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 17:51:53,826 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 17:51:53,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:53,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@514f13a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53, skipping insertion in model container [2023-12-19 17:51:53,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:53,842 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 17:51:53,925 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i[834,847] [2023-12-19 17:51:53,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:51:53,948 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 17:51:53,955 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i[834,847] [2023-12-19 17:51:53,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:51:53,966 INFO L206 MainTranslator]: Completed translation [2023-12-19 17:51:53,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53 WrapperNode [2023-12-19 17:51:53,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 17:51:53,968 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 17:51:53,968 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 17:51:53,968 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 17:51:53,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:53,975 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:53,985 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-12-19 17:51:53,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 17:51:53,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 17:51:53,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 17:51:53,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 17:51:53,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:53,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:53,993 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:54,000 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-19 17:51:54,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:54,000 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:54,002 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:54,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:54,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:54,005 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:54,006 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 17:51:54,007 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 17:51:54,007 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 17:51:54,007 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 17:51:54,007 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (1/1) ... [2023-12-19 17:51:54,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:51:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:51:54,052 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) [2023-12-19 17:51:54,095 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 [2023-12-19 17:51:54,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 17:51:54,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 17:51:54,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-19 17:51:54,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-19 17:51:54,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-19 17:51:54,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-19 17:51:54,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 17:51:54,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 17:51:54,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-19 17:51:54,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-19 17:51:54,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 17:51:54,115 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 17:51:54,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-19 17:51:54,162 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 17:51:54,164 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 17:51:54,249 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 17:51:54,265 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 17:51:54,266 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 17:51:54,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:51:54 BoogieIcfgContainer [2023-12-19 17:51:54,266 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 17:51:54,267 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 17:51:54,268 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 17:51:54,269 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 17:51:54,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 05:51:53" (1/3) ... [2023-12-19 17:51:54,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f292af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:51:54, skipping insertion in model container [2023-12-19 17:51:54,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:51:53" (2/3) ... [2023-12-19 17:51:54,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f292af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:51:54, skipping insertion in model container [2023-12-19 17:51:54,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:51:54" (3/3) ... [2023-12-19 17:51:54,271 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2023-12-19 17:51:54,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 17:51:54,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 17:51:54,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 17:51:54,313 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;@3bcaee1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 17:51:54,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 17:51:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 17:51:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-19 17:51:54,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:51:54,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:51:54,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:51:54,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:51:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash -670687716, now seen corresponding path program 1 times [2023-12-19 17:51:54,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:51:54,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881148890] [2023-12-19 17:51:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:51:54,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:51:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:51:54,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:51:54,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881148890] [2023-12-19 17:51:54,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881148890] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:51:54,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:51:54,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 17:51:54,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792714030] [2023-12-19 17:51:54,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:51:54,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 17:51:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:51:54,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 17:51:54,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 17:51:54,615 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:51:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:51:54,651 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2023-12-19 17:51:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 17:51:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-19 17:51:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:51:54,656 INFO L225 Difference]: With dead ends: 40 [2023-12-19 17:51:54,656 INFO L226 Difference]: Without dead ends: 22 [2023-12-19 17:51:54,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 17:51:54,660 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:51:54,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:51:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-19 17:51:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2023-12-19 17:51:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 17:51:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-12-19 17:51:54,682 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2023-12-19 17:51:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:51:54,682 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-12-19 17:51:54,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:51:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-12-19 17:51:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-19 17:51:54,683 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:51:54,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:51:54,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 17:51:54,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:51:54,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:51:54,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1506992356, now seen corresponding path program 1 times [2023-12-19 17:51:54,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:51:54,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392979843] [2023-12-19 17:51:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:51:54,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:51:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:51:54,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:51:54,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392979843] [2023-12-19 17:51:54,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392979843] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:51:54,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464813912] [2023-12-19 17:51:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:51:54,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:51:54,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:51:54,798 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) [2023-12-19 17:51:54,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 17:51:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:54,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 17:51:54,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:51:54,919 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 [2023-12-19 17:51:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:51:55,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:51:55,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-19 17:51:55,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-12-19 17:51:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:51:55,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464813912] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:51:55,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:51:55,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 8] total 15 [2023-12-19 17:51:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156993494] [2023-12-19 17:51:55,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:51:55,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 17:51:55,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:51:55,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 17:51:55,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-12-19 17:51:55,237 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:51:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:51:55,422 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2023-12-19 17:51:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 17:51:55,423 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-19 17:51:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:51:55,423 INFO L225 Difference]: With dead ends: 49 [2023-12-19 17:51:55,423 INFO L226 Difference]: Without dead ends: 33 [2023-12-19 17:51:55,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-12-19 17:51:55,425 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:51:55,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 90 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:51:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-19 17:51:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-12-19 17:51:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 17:51:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-12-19 17:51:55,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 10 [2023-12-19 17:51:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:51:55,430 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-12-19 17:51:55,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:51:55,430 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-12-19 17:51:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-19 17:51:55,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:51:55,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:51:55,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 17:51:55,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:51:55,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:51:55,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:51:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1863960477, now seen corresponding path program 1 times [2023-12-19 17:51:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:51:55,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361786429] [2023-12-19 17:51:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:51:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:51:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:55,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 17:51:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 17:51:55,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:51:55,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361786429] [2023-12-19 17:51:55,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361786429] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:51:55,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526298287] [2023-12-19 17:51:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:51:55,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:51:55,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:51:55,772 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) [2023-12-19 17:51:55,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 17:51:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:55,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-19 17:51:55,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:51:55,839 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 [2023-12-19 17:51:55,849 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 [2023-12-19 17:51:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:51:56,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:51:56,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2023-12-19 17:51:56,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:51:56,669 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 253 treesize of output 245 [2023-12-19 17:51:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:51:56,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526298287] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:51:56,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:51:56,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 15] total 29 [2023-12-19 17:51:56,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902865603] [2023-12-19 17:51:56,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:51:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-19 17:51:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:51:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-19 17:51:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2023-12-19 17:51:56,729 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 29 states, 25 states have (on average 1.88) internal successors, (47), 26 states have internal predecessors, (47), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 17:51:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:51:57,434 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2023-12-19 17:51:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 17:51:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.88) internal successors, (47), 26 states have internal predecessors, (47), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-12-19 17:51:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:51:57,435 INFO L225 Difference]: With dead ends: 73 [2023-12-19 17:51:57,435 INFO L226 Difference]: Without dead ends: 48 [2023-12-19 17:51:57,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 17:51:57,437 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 103 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 17:51:57,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 79 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 17:51:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-19 17:51:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2023-12-19 17:51:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 17:51:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-12-19 17:51:57,443 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 20 [2023-12-19 17:51:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:51:57,444 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-12-19 17:51:57,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.88) internal successors, (47), 26 states have internal predecessors, (47), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 17:51:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-12-19 17:51:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-19 17:51:57,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:51:57,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:51:57,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 17:51:57,649 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,SelfDestructingSolverStorable2 [2023-12-19 17:51:57,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:51:57,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:51:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1166430656, now seen corresponding path program 1 times [2023-12-19 17:51:57,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:51:57,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367458926] [2023-12-19 17:51:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:51:57,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:51:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:57,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-19 17:51:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:57,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 17:51:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 17:51:57,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:51:57,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367458926] [2023-12-19 17:51:57,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367458926] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:51:57,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869120100] [2023-12-19 17:51:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:51:57,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:51:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:51:57,797 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) [2023-12-19 17:51:57,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 17:51:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:51:57,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-19 17:51:57,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:51:57,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-19 17:51:57,860 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 [2023-12-19 17:51:57,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:51:57,877 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 [2023-12-19 17:51:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 17:51:58,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:51:59,291 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 147 treesize of output 141 [2023-12-19 17:51:59,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:51:59,302 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 828 treesize of output 808 [2023-12-19 17:51:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 17:51:59,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869120100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:51:59,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:51:59,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 18] total 35 [2023-12-19 17:51:59,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136679823] [2023-12-19 17:51:59,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:51:59,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-19 17:51:59,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:51:59,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-19 17:51:59,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 17:51:59,466 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 35 states, 31 states have (on average 2.0) internal successors, (62), 33 states have internal predecessors, (62), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-19 17:52:01,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:52:01,908 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2023-12-19 17:52:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-19 17:52:01,908 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.0) internal successors, (62), 33 states have internal predecessors, (62), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-12-19 17:52:01,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:52:01,909 INFO L225 Difference]: With dead ends: 112 [2023-12-19 17:52:01,909 INFO L226 Difference]: Without dead ends: 79 [2023-12-19 17:52:01,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=606, Invalid=2586, Unknown=0, NotChecked=0, Total=3192 [2023-12-19 17:52:01,911 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 134 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 17:52:01,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 111 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 17:52:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-19 17:52:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2023-12-19 17:52:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-19 17:52:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2023-12-19 17:52:01,923 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 30 [2023-12-19 17:52:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:52:01,923 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2023-12-19 17:52:01,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.0) internal successors, (62), 33 states have internal predecessors, (62), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-19 17:52:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2023-12-19 17:52:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-19 17:52:01,924 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:52:01,924 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:52:01,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-19 17:52:02,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:52:02,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:52:02,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:52:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash -891463103, now seen corresponding path program 2 times [2023-12-19 17:52:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:52:02,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932296167] [2023-12-19 17:52:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:52:02,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:52:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:02,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-19 17:52:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:02,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-19 17:52:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:02,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-19 17:52:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-19 17:52:02,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:52:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932296167] [2023-12-19 17:52:02,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932296167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:52:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650212481] [2023-12-19 17:52:02,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:52:02,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:52:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:52:02,265 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) [2023-12-19 17:52:02,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 17:52:02,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:52:02,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:52:02,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-19 17:52:02,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:52:02,342 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 [2023-12-19 17:52:02,359 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 [2023-12-19 17:52:02,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:02,377 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 [2023-12-19 17:52:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 17:52:02,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:52:06,716 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 153 treesize of output 147 [2023-12-19 17:52:06,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:06,741 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 2170 treesize of output 2122 [2023-12-19 17:52:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 17:52:07,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650212481] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:52:07,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:52:07,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18, 24] total 46 [2023-12-19 17:52:07,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393861091] [2023-12-19 17:52:07,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:52:07,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-19 17:52:07,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:52:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-19 17:52:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1759, Unknown=0, NotChecked=0, Total=2070 [2023-12-19 17:52:07,066 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 46 states, 40 states have (on average 1.925) internal successors, (77), 44 states have internal predecessors, (77), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-19 17:52:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:52:12,970 INFO L93 Difference]: Finished difference Result 150 states and 177 transitions. [2023-12-19 17:52:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-19 17:52:12,970 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 1.925) internal successors, (77), 44 states have internal predecessors, (77), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 40 [2023-12-19 17:52:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:52:12,971 INFO L225 Difference]: With dead ends: 150 [2023-12-19 17:52:12,971 INFO L226 Difference]: Without dead ends: 92 [2023-12-19 17:52:12,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=916, Invalid=4196, Unknown=0, NotChecked=0, Total=5112 [2023-12-19 17:52:12,973 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:52:12,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 192 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 17:52:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-19 17:52:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2023-12-19 17:52:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.105263157894737) internal successors, (63), 58 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-19 17:52:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2023-12-19 17:52:12,987 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 40 [2023-12-19 17:52:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:52:12,988 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2023-12-19 17:52:12,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 1.925) internal successors, (77), 44 states have internal predecessors, (77), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-19 17:52:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2023-12-19 17:52:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-19 17:52:12,988 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:52:12,989 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-19 17:52:12,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 17:52:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:52:13,193 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:52:13,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:52:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1960854428, now seen corresponding path program 3 times [2023-12-19 17:52:13,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:52:13,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315374914] [2023-12-19 17:52:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:52:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:52:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:13,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-19 17:52:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:13,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 17:52:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:13,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-19 17:52:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:13,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 17:52:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-19 17:52:13,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:52:13,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315374914] [2023-12-19 17:52:13,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315374914] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:52:13,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921643136] [2023-12-19 17:52:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 17:52:13,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:52:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:52:13,327 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) [2023-12-19 17:52:13,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 17:52:13,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 17:52:13,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:52:13,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 17:52:13,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:52:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-19 17:52:13,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:52:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-19 17:52:14,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921643136] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:52:14,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:52:14,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 11] total 18 [2023-12-19 17:52:14,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457868996] [2023-12-19 17:52:14,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:52:14,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 17:52:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:52:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 17:52:14,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-12-19 17:52:14,190 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 17:52:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:52:14,784 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2023-12-19 17:52:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 17:52:14,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2023-12-19 17:52:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:52:14,785 INFO L225 Difference]: With dead ends: 163 [2023-12-19 17:52:14,785 INFO L226 Difference]: Without dead ends: 98 [2023-12-19 17:52:14,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2023-12-19 17:52:14,786 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 17:52:14,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 160 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 17:52:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-19 17:52:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2023-12-19 17:52:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 17:52:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2023-12-19 17:52:14,799 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 50 [2023-12-19 17:52:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:52:14,799 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2023-12-19 17:52:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 17:52:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2023-12-19 17:52:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-19 17:52:14,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:52:14,800 INFO L195 NwaCegarLoop]: trace histogram [12, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-19 17:52:14,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 17:52:15,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:52:15,006 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:52:15,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:52:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash 488361172, now seen corresponding path program 4 times [2023-12-19 17:52:15,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:52:15,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834427629] [2023-12-19 17:52:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:52:15,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:52:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:15,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-19 17:52:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:15,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-19 17:52:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:15,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-12-19 17:52:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:15,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-12-19 17:52:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:52:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-19 17:52:15,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:52:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834427629] [2023-12-19 17:52:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834427629] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:52:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687514408] [2023-12-19 17:52:15,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 17:52:15,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:52:15,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:52:15,272 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) [2023-12-19 17:52:15,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 17:52:15,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 17:52:15,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:52:15,809 WARN L260 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 116 conjunts are in the unsatisfiable core [2023-12-19 17:52:15,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:52:15,820 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 [2023-12-19 17:52:15,835 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 [2023-12-19 17:52:15,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:15,858 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 [2023-12-19 17:52:15,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:15,886 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 39 treesize of output 44 [2023-12-19 17:52:15,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:15,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 48 treesize of output 56 [2023-12-19 17:52:15,957 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:15,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-12-19 17:52:15,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:15,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-12-19 17:52:16,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:16,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-12-19 17:52:16,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:16,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2023-12-19 17:52:16,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:16,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2023-12-19 17:52:16,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:16,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2023-12-19 17:52:16,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:52:16,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2023-12-19 17:52:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-19 17:52:18,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:53:38,812 WARN L293 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 1391 DAG size of output: 1385 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 17:56:19,906 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 1060 treesize of output 1048 [2023-12-19 17:56:28,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 17:56:28,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 3620628850580888 treesize of output 3620489196771736 [2023-12-19 17:58:20,749 WARN L293 SmtUtils]: Spent 1.87m on a formula simplification. DAG size of input: 52922 DAG size of output: 861 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 17:59:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 58 refuted. 9 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 17:59:12,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687514408] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:59:12,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:59:12,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 29, 42] total 82 [2023-12-19 17:59:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973714693] [2023-12-19 17:59:12,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:59:12,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-12-19 17:59:12,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:59:12,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-12-19 17:59:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=5632, Unknown=14, NotChecked=0, Total=6642 [2023-12-19 17:59:12,486 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 82 states, 72 states have (on average 1.5416666666666667) internal successors, (111), 79 states have internal predecessors, (111), 11 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-19 17:59:24,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 17:59:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:59:50,019 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2023-12-19 17:59:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-19 17:59:50,019 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 72 states have (on average 1.5416666666666667) internal successors, (111), 79 states have internal predecessors, (111), 11 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 57 [2023-12-19 17:59:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:59:50,020 INFO L225 Difference]: With dead ends: 172 [2023-12-19 17:59:50,020 INFO L226 Difference]: Without dead ends: 121 [2023-12-19 17:59:50,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 186.2s TimeCoverageRelationStatistics Valid=1815, Invalid=9301, Unknown=14, NotChecked=0, Total=11130 [2023-12-19 17:59:50,022 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 425 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:59:50,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 421 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 21.0s Time] [2023-12-19 17:59:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-19 17:59:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2023-12-19 17:59:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 87 states have internal predecessors, (88), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-19 17:59:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2023-12-19 17:59:50,057 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 57 [2023-12-19 17:59:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:59:50,058 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2023-12-19 17:59:50,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 72 states have (on average 1.5416666666666667) internal successors, (111), 79 states have internal predecessors, (111), 11 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-19 17:59:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2023-12-19 17:59:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-19 17:59:50,059 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:59:50,059 INFO L195 NwaCegarLoop]: trace histogram [14, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-12-19 17:59:50,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 17:59:50,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:59:50,261 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:59:50,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:59:50,262 INFO L85 PathProgramCache]: Analyzing trace with hash 101132261, now seen corresponding path program 5 times [2023-12-19 17:59:50,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:59:50,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789760282] [2023-12-19 17:59:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:59:50,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:59:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:50,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 17:59:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:50,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-19 17:59:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:50,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-19 17:59:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:50,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-12-19 17:59:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:50,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-12-19 17:59:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:59:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 10 proven. 105 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-19 17:59:50,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:59:50,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789760282] [2023-12-19 17:59:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789760282] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:59:50,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474666783] [2023-12-19 17:59:50,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 17:59:50,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:59:50,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:59:50,656 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) [2023-12-19 17:59:50,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 18:01:03,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-19 18:01:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 18:01:03,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-19 18:01:03,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 18:01:03,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-19 18:01:03,341 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 23 treesize of output 22 [2023-12-19 18:01:03,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:01:03,388 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 32 treesize of output 34 [2023-12-19 18:01:03,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:01:03,446 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 41 treesize of output 46 [2023-12-19 18:01:03,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:01:03,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 58 [2023-12-19 18:01:03,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:01:03,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 70 [2023-12-19 18:01:03,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:01:03,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 82 [2023-12-19 18:01:03,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:01:03,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 77 treesize of output 94 [2023-12-19 18:01:03,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:01:03,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 86 treesize of output 106 [2023-12-19 18:01:03,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:01:03,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 118 [2023-12-19 18:01:03,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:01:03,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 130 [2023-12-19 18:01:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 18 proven. 165 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-19 18:01:07,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 18:03:25,130 WARN L293 SmtUtils]: Spent 10.48s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:03:25,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 485 treesize of output 479 [2023-12-19 18:03:28,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 18:03:28,146 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 266822136365020 treesize of output 266787776495580 [2023-12-19 18:03:50,262 WARN L293 SmtUtils]: Spent 22.09s on a formula simplification. DAG size of input: 16548 DAG size of output: 331 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 18:04:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 18:04:20,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474666783] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 18:04:20,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 18:04:20,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29, 35] total 74 [2023-12-19 18:04:20,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710985442] [2023-12-19 18:04:20,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 18:04:20,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-19 18:04:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:04:20,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-19 18:04:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=4746, Unknown=1, NotChecked=0, Total=5402 [2023-12-19 18:04:20,838 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 74 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 72 states have internal predecessors, (116), 13 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-19 18:04:32,243 WARN L293 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 151 DAG size of output: 127 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 18:04:33,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:04:41,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:04:45,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:04:48,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:05:01,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-19 18:05:06,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:05:09,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:05:12,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:05:20,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:05:23,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:05:24,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:05:26,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:05:29,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-19 18:05:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 18:05:31,575 INFO L93 Difference]: Finished difference Result 224 states and 244 transitions. [2023-12-19 18:05:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-19 18:05:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 72 states have internal predecessors, (116), 13 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 68 [2023-12-19 18:05:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 18:05:31,577 INFO L225 Difference]: With dead ends: 224 [2023-12-19 18:05:31,577 INFO L226 Difference]: Without dead ends: 134 [2023-12-19 18:05:31,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 156.3s TimeCoverageRelationStatistics Valid=1234, Invalid=7885, Unknown=1, NotChecked=0, Total=9120 [2023-12-19 18:05:31,579 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 240 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.7s IncrementalHoareTripleChecker+Time [2023-12-19 18:05:31,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 734 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2718 Invalid, 0 Unknown, 0 Unchecked, 43.7s Time] [2023-12-19 18:05:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-19 18:05:31,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2023-12-19 18:05:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 104 states have internal predecessors, (105), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-19 18:05:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2023-12-19 18:05:31,617 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 68 [2023-12-19 18:05:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 18:05:31,617 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2023-12-19 18:05:31,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 72 states have internal predecessors, (116), 13 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-19 18:05:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2023-12-19 18:05:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-19 18:05:31,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 18:05:31,619 INFO L195 NwaCegarLoop]: trace histogram [16, 13, 13, 12, 12, 12, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2023-12-19 18:05:31,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-19 18:05:31,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:05:31,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 18:05:31,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 18:05:31,830 INFO L85 PathProgramCache]: Analyzing trace with hash 205585476, now seen corresponding path program 6 times [2023-12-19 18:05:31,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 18:05:31,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189922986] [2023-12-19 18:05:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 18:05:31,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 18:05:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-19 18:05:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-19 18:05:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-12-19 18:05:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-12-19 18:05:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-12-19 18:05:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-12-19 18:05:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-12-19 18:05:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-12-19 18:05:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-12-19 18:05:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-12-19 18:05:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-12-19 18:05:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-12-19 18:05:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 18:05:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 24 proven. 136 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2023-12-19 18:05:32,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 18:05:32,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189922986] [2023-12-19 18:05:32,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189922986] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 18:05:32,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284941958] [2023-12-19 18:05:32,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 18:05:32,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 18:05:32,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 18:05:32,391 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) [2023-12-19 18:05:32,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process Received shutdown request... [2023-12-19 18:06:28,415 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 [2023-12-19 18:06:28,415 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 18:06:29,615 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-19 18:06:29,625 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forcibly destroying the process [2023-12-19 18:06:29,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 18:06:29,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 18:06:29,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-19 18:06:29,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747256929] [2023-12-19 18:06:29,639 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 18:06:29,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-19 18:06:29,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 18:06:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-19 18:06:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-12-19 18:06:29,640 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-19 18:06:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 18:06:29,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-12-19 18:06:29,642 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 18:06:29,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 18:06:29,643 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 18:06:29,649 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forcibly destroying the process [2023-12-19 18:06:29,649 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,SelfDestructingSolverStorable8 [2023-12-19 18:06:29,650 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (127states) and FLOYD_HOARE automaton (currently 2 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). [2023-12-19 18:06:29,652 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2023-12-19 18:06:29,654 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 18:06:29,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 06:06:29 BoogieIcfgContainer [2023-12-19 18:06:29,655 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 18:06:29,655 INFO L158 Benchmark]: Toolchain (without parser) took 875836.12ms. Allocated memory was 213.9MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 149.7MB in the beginning and 967.5MB in the end (delta: -817.8MB). Peak memory consumption was 566.4MB. Max. memory is 8.0GB. [2023-12-19 18:06:29,655 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 213.9MB. Free memory is still 162.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 18:06:29,656 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.53ms. Allocated memory is still 213.9MB. Free memory was 149.4MB in the beginning and 138.5MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 18:06:29,656 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.65ms. Allocated memory is still 213.9MB. Free memory was 138.5MB in the beginning and 137.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 18:06:29,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 137 [2023-12-19 18:06:29,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-19 18:06:29,661 INFO L158 Benchmark]: Boogie Preprocessor took 20.60ms. Allocated memory is still 213.9MB. Free memory was 137.1MB in the beginning and 135.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 18:06:29,664 INFO L158 Benchmark]: RCFGBuilder took 259.50ms. Allocated memory was 213.9MB in the beginning and 318.8MB in the end (delta: 104.9MB). Free memory was 135.1MB in the beginning and 275.8MB in the end (delta: -140.7MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2023-12-19 18:06:29,664 INFO L158 Benchmark]: TraceAbstraction took 875387.59ms. Allocated memory was 318.8MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 275.3MB in the beginning and 967.5MB in the end (delta: -692.2MB). Peak memory consumption was 586.0MB. Max. memory is 8.0GB. [2023-12-19 18:06:29,666 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 213.9MB. Free memory is still 162.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 144.53ms. Allocated memory is still 213.9MB. Free memory was 149.4MB in the beginning and 138.5MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.65ms. Allocated memory is still 213.9MB. Free memory was 138.5MB in the beginning and 137.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.60ms. Allocated memory is still 213.9MB. Free memory was 137.1MB in the beginning and 135.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 259.50ms. Allocated memory was 213.9MB in the beginning and 318.8MB in the end (delta: 104.9MB). Free memory was 135.1MB in the beginning and 275.8MB in the end (delta: -140.7MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. * TraceAbstraction took 875387.59ms. Allocated memory was 318.8MB in the beginning and 1.6GB in the end (delta: 1.3GB). Free memory was 275.3MB in the beginning and 967.5MB in the end (delta: -692.2MB). Peak memory consumption was 586.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 22]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 22). Cancelled while NwaCegarLoop was constructing difference of abstraction (127states) and FLOYD_HOARE automaton (currently 2 states, 19 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 875.4s, OverallIterations: 9, TraceHistogramMax: 16, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 118.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1161 SdHoareTripleChecker+Valid, 67.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1144 mSDsluCounter, 1813 SdHoareTripleChecker+Invalid, 65.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1673 mSDsCounter, 872 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6198 IncrementalHoareTripleChecker+Invalid, 7070 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 872 mSolverCounterUnsat, 140 mSDtfsCounter, 6198 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 797 GetRequests, 344 SyntacticMatches, 30 SemanticMatches, 423 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8346 ImplicationChecksByTransitivity, 355.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=8, InterpolantAutomatonStates: 226, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 107 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 73.8s SatisfiabilityAnalysisTime, 624.0s InterpolantComputationTime, 692 NumberOfCodeBlocks, 683 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 944 ConstructedInterpolants, 87 QuantifiedInterpolants, 64137 SizeOfPredicates, 69 NumberOfNonLiveVariables, 919 ConjunctsInSsa, 385 ConjunctsInUnsatCore, 23 InterpolantComputations, 1 PerfectInterpolantSequences, 1233/2218 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