/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/verifythis/prefixsum_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 23:01:47,865 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 23:01:47,933 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 23:01:47,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 23:01:47,937 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 23:01:47,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 23:01:47,959 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 23:01:47,959 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 23:01:47,959 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 23:01:47,962 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 23:01:47,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 23:01:47,963 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 23:01:47,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 23:01:47,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 23:01:47,964 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 23:01:47,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 23:01:47,964 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 23:01:47,965 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 23:01:47,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 23:01:47,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 23:01:47,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 23:01:47,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 23:01:47,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 23:01:47,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 23:01:47,966 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 23:01:47,966 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 23:01:47,966 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 23:01:47,967 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 23:01:47,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 23:01:47,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 23:01:47,968 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 23:01:47,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 23:01:47,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:01:47,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 23:01:47,968 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 23:01:47,968 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 23:01:47,968 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 23:01:47,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 23:01:47,969 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 23:01:47,969 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 23:01:47,969 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 23:01:47,969 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 23:01:47,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 23:01:47,969 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 23:01:48,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 23:01:48,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 23:01:48,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 23:01:48,154 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 23:01:48,154 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 23:01:48,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_rec.c [2023-12-15 23:01:49,119 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 23:01:49,308 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 23:01:49,309 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_rec.c [2023-12-15 23:01:49,314 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb473a58/179d9caeebcb46a693df1c47661d8829/FLAG932759b7c [2023-12-15 23:01:49,325 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb473a58/179d9caeebcb46a693df1c47661d8829 [2023-12-15 23:01:49,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 23:01:49,327 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 23:01:49,332 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 23:01:49,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 23:01:49,335 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 23:01:49,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455e14a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49, skipping insertion in model container [2023-12-15 23:01:49,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,355 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 23:01:49,464 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_rec.c[525,538] [2023-12-15 23:01:49,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:01:49,487 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 23:01:49,497 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_rec.c[525,538] [2023-12-15 23:01:49,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:01:49,515 INFO L206 MainTranslator]: Completed translation [2023-12-15 23:01:49,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49 WrapperNode [2023-12-15 23:01:49,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 23:01:49,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 23:01:49,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 23:01:49,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 23:01:49,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,526 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,539 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-12-15 23:01:49,539 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 23:01:49,539 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 23:01:49,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 23:01:49,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 23:01:49,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,548 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,557 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2023-12-15 23:01:49,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,557 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,563 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,565 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,566 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,567 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,568 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 23:01:49,569 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 23:01:49,569 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 23:01:49,569 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 23:01:49,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (1/1) ... [2023-12-15 23:01:49,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:01:49,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:01:49,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-15 23:01:49,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-15 23:01:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 23:01:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 23:01:49,641 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 23:01:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 23:01:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 23:01:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2023-12-15 23:01:49,642 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2023-12-15 23:01:49,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 23:01:49,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 23:01:49,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-15 23:01:49,643 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2023-12-15 23:01:49,644 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2023-12-15 23:01:49,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 23:01:49,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 23:01:49,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 23:01:49,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 23:01:49,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-15 23:01:49,644 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-15 23:01:49,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 23:01:49,717 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 23:01:49,719 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 23:01:49,943 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 23:01:49,981 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 23:01:49,981 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-15 23:01:49,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:01:49 BoogieIcfgContainer [2023-12-15 23:01:49,982 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 23:01:49,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 23:01:49,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 23:01:49,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 23:01:49,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:01:49" (1/3) ... [2023-12-15 23:01:49,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242f6dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:01:49, skipping insertion in model container [2023-12-15 23:01:49,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:01:49" (2/3) ... [2023-12-15 23:01:49,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242f6dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:01:49, skipping insertion in model container [2023-12-15 23:01:49,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:01:49" (3/3) ... [2023-12-15 23:01:49,990 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2023-12-15 23:01:50,002 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 23:01:50,002 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 23:01:50,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 23:01:50,045 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;@5bc22406, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 23:01:50,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 23:01:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-15 23:01:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-15 23:01:50,055 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:01:50,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:01:50,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:01:50,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:01:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash 485352820, now seen corresponding path program 1 times [2023-12-15 23:01:50,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:01:50,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661571163] [2023-12-15 23:01:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:01:50,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:01:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:01:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 23:01:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 23:01:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-15 23:01:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-15 23:01:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-15 23:01:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 23:01:50,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:01:50,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661571163] [2023-12-15 23:01:50,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661571163] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:01:50,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:01:50,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 23:01:50,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447275908] [2023-12-15 23:01:50,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:01:50,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 23:01:50,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:01:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 23:01:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:01:50,333 INFO L87 Difference]: Start difference. First operand has 43 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 23:01:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:01:50,407 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2023-12-15 23:01:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 23:01:50,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-12-15 23:01:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:01:50,415 INFO L225 Difference]: With dead ends: 85 [2023-12-15 23:01:50,415 INFO L226 Difference]: Without dead ends: 42 [2023-12-15 23:01:50,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 23:01:50,421 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:01:50,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 66 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:01:50,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-15 23:01:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-12-15 23:01:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-15 23:01:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-12-15 23:01:50,451 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 39 [2023-12-15 23:01:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:01:50,451 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-12-15 23:01:50,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 23:01:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-12-15 23:01:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-15 23:01:50,454 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:01:50,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:01:50,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 23:01:50,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:01:50,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:01:50,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1650249290, now seen corresponding path program 1 times [2023-12-15 23:01:50,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:01:50,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817488924] [2023-12-15 23:01:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:01:50,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:01:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:01:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 23:01:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 23:01:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-15 23:01:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-15 23:01:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-15 23:01:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 23:01:50,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:01:50,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817488924] [2023-12-15 23:01:50,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817488924] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:01:50,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:01:50,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-15 23:01:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840842022] [2023-12-15 23:01:50,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:01:50,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 23:01:50,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:01:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 23:01:50,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-15 23:01:50,811 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 23:01:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:01:50,944 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2023-12-15 23:01:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-15 23:01:50,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-12-15 23:01:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:01:50,947 INFO L225 Difference]: With dead ends: 55 [2023-12-15 23:01:50,947 INFO L226 Difference]: Without dead ends: 45 [2023-12-15 23:01:50,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-15 23:01:50,948 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:01:50,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:01:50,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-15 23:01:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-12-15 23:01:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-15 23:01:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2023-12-15 23:01:50,954 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2023-12-15 23:01:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:01:50,955 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2023-12-15 23:01:50,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 23:01:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2023-12-15 23:01:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-15 23:01:50,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:01:50,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:01:50,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 23:01:50,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:01:50,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:01:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash -310323887, now seen corresponding path program 1 times [2023-12-15 23:01:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:01:50,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366005048] [2023-12-15 23:01:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:01:50,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:01:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:51,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:01:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:51,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 23:01:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:51,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 23:01:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:51,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-15 23:01:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:51,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-15 23:01:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:51,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-15 23:01:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 23:01:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:01:51,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366005048] [2023-12-15 23:01:51,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366005048] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:01:51,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139949027] [2023-12-15 23:01:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:01:51,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:01:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:01:51,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:01:51,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 23:01:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:51,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 23:01:51,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:01:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 23:01:51,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:01:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 23:01:51,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139949027] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:01:51,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 23:01:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-12-15 23:01:51,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042992032] [2023-12-15 23:01:51,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 23:01:51,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 23:01:51,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:01:51,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 23:01:51,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-12-15 23:01:51,553 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-15 23:01:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:01:51,654 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2023-12-15 23:01:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 23:01:51,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 40 [2023-12-15 23:01:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:01:51,657 INFO L225 Difference]: With dead ends: 67 [2023-12-15 23:01:51,657 INFO L226 Difference]: Without dead ends: 44 [2023-12-15 23:01:51,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-12-15 23:01:51,659 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:01:51,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 191 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 23:01:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-15 23:01:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-12-15 23:01:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-15 23:01:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-12-15 23:01:51,673 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 40 [2023-12-15 23:01:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:01:51,674 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-12-15 23:01:51,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-12-15 23:01:51,674 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-12-15 23:01:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-15 23:01:51,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:01:51,677 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:01:51,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 23:01:51,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:01:51,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:01:51,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:01:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1722309354, now seen corresponding path program 2 times [2023-12-15 23:01:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:01:51,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155416810] [2023-12-15 23:01:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:01:51,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:01:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:52,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:01:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:52,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 23:01:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:52,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 23:01:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-15 23:01:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:52,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-15 23:01:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:53,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-15 23:01:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 23:01:53,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:01:53,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155416810] [2023-12-15 23:01:53,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155416810] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:01:53,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745947153] [2023-12-15 23:01:53,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 23:01:53,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:01:53,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:01:53,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:01:53,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 23:01:53,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 23:01:53,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 23:01:53,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-15 23:01:53,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:01:53,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-15 23:01:54,032 WARN L876 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int)) (and (<= |c_downsweep_#in~right| (+ downsweep_~left 1)) (<= downsweep_~left |c_downsweep_#in~left|) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|)) (.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4)))) (let ((.cse3 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4))) (.cse2 (select .cse0 .cse1))) (store (store .cse0 .cse1 (+ .cse2 (select .cse0 .cse3))) .cse3 .cse2))))))) is different from true [2023-12-15 23:01:54,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 23:01:54,073 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 20 [2023-12-15 23:01:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 23:01:54,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:01:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745947153] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:01:54,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 23:01:54,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 30 [2023-12-15 23:01:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561319392] [2023-12-15 23:01:54,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 23:01:54,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-15 23:01:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:01:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-15 23:01:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=894, Unknown=1, NotChecked=60, Total=1056 [2023-12-15 23:01:54,432 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 30 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 25 states have internal predecessors, (43), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-15 23:01:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:01:55,979 INFO L93 Difference]: Finished difference Result 95 states and 130 transitions. [2023-12-15 23:01:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-15 23:01:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 25 states have internal predecessors, (43), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 41 [2023-12-15 23:01:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:01:55,981 INFO L225 Difference]: With dead ends: 95 [2023-12-15 23:01:55,981 INFO L226 Difference]: Without dead ends: 93 [2023-12-15 23:01:55,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=462, Invalid=2733, Unknown=1, NotChecked=110, Total=3306 [2023-12-15 23:01:55,983 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 198 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 23:01:55,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 380 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 918 Invalid, 0 Unknown, 124 Unchecked, 0.7s Time] [2023-12-15 23:01:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-15 23:01:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2023-12-15 23:01:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 12 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2023-12-15 23:01:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2023-12-15 23:01:55,993 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 41 [2023-12-15 23:01:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:01:55,993 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2023-12-15 23:01:55,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 25 states have internal predecessors, (43), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-15 23:01:55,993 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2023-12-15 23:01:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-15 23:01:55,994 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:01:55,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:01:56,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 23:01:56,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-15 23:01:56,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:01:56,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:01:56,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1633591371, now seen corresponding path program 1 times [2023-12-15 23:01:56,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:01:56,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830445542] [2023-12-15 23:01:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:01:56,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:01:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:56,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-15 23:01:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:56,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-15 23:01:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:56,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-15 23:01:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-15 23:01:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:56,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-15 23:01:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:56,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-12-15 23:01:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 23:01:56,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:01:56,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830445542] [2023-12-15 23:01:56,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830445542] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:01:56,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593632948] [2023-12-15 23:01:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:01:56,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:01:56,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:01:56,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 23:01:56,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 23:01:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:01:56,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-15 23:01:56,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:01:56,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-12-15 23:01:56,509 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 7 treesize of output 6 [2023-12-15 23:01:56,551 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-15 23:01:56,552 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 16 treesize of output 18 [2023-12-15 23:01:56,580 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 14 treesize of output 16 [2023-12-15 23:01:56,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-12-15 23:01:56,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-12-15 23:01:56,757 WARN L876 $PredicateComparison]: unable to prove that (exists ((upsweep_~right Int) (upsweep_~a.offset Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_upsweep_#in~a.base| (let ((.cse0 (+ (* upsweep_~right 4) upsweep_~a.offset))) (store (select |c_old(#memory_int#1)| |c_upsweep_#in~a.base|) .cse0 (select (select |c_#memory_int#1| |c_upsweep_#in~a.base|) .cse0))))) (<= |c_upsweep_#in~a.offset| upsweep_~a.offset))) is different from true [2023-12-15 23:01:56,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-12-15 23:01:56,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2023-12-15 23:01:56,888 WARN L876 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int)) (and (<= downsweep_~left |c_downsweep_#in~left|) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 (select (select |c_#memory_int#1| |c_downsweep_#in~a.base|) .cse2))))))) is different from true [2023-12-15 23:01:56,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 102 [2023-12-15 23:01:57,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 158 [2023-12-15 23:01:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-15 23:01:57,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-15 23:03:06,663 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 23:03:06,698 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 23:03:07,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 23:03:07,899 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-15 23:03:07,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-15 23:03:07,906 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 23:03:07,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-15 23:03:07,906 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 45 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while executing Executor. [2023-12-15 23:03:07,909 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-12-15 23:03:07,910 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 23:03:07,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:03:07 BoogieIcfgContainer [2023-12-15 23:03:07,911 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 23:03:07,912 INFO L158 Benchmark]: Toolchain (without parser) took 78584.31ms. Allocated memory was 205.5MB in the beginning and 355.5MB in the end (delta: 149.9MB). Free memory was 150.3MB in the beginning and 244.4MB in the end (delta: -94.1MB). Peak memory consumption was 56.9MB. Max. memory is 8.0GB. [2023-12-15 23:03:07,912 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 205.5MB. Free memory is still 158.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 23:03:07,912 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.81ms. Allocated memory is still 205.5MB. Free memory was 150.0MB in the beginning and 138.3MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 23:03:07,912 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.56ms. Allocated memory is still 205.5MB. Free memory was 138.3MB in the beginning and 136.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 23:03:07,912 INFO L158 Benchmark]: Boogie Preprocessor took 29.04ms. Allocated memory is still 205.5MB. Free memory was 136.6MB in the beginning and 134.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 23:03:07,913 INFO L158 Benchmark]: RCFGBuilder took 413.08ms. Allocated memory was 205.5MB in the beginning and 295.7MB in the end (delta: 90.2MB). Free memory was 134.1MB in the beginning and 262.2MB in the end (delta: -128.1MB). Peak memory consumption was 20.8MB. Max. memory is 8.0GB. [2023-12-15 23:03:07,913 INFO L158 Benchmark]: TraceAbstraction took 77928.18ms. Allocated memory was 295.7MB in the beginning and 355.5MB in the end (delta: 59.8MB). Free memory was 261.2MB in the beginning and 244.4MB in the end (delta: 16.8MB). Peak memory consumption was 77.1MB. Max. memory is 8.0GB. [2023-12-15 23:03:07,914 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 205.5MB. Free memory is still 158.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.81ms. Allocated memory is still 205.5MB. Free memory was 150.0MB in the beginning and 138.3MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.56ms. Allocated memory is still 205.5MB. Free memory was 138.3MB in the beginning and 136.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.04ms. Allocated memory is still 205.5MB. Free memory was 136.6MB in the beginning and 134.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 413.08ms. Allocated memory was 205.5MB in the beginning and 295.7MB in the end (delta: 90.2MB). Free memory was 134.1MB in the beginning and 262.2MB in the end (delta: -128.1MB). Peak memory consumption was 20.8MB. Max. memory is 8.0GB. * TraceAbstraction took 77928.18ms. Allocated memory was 295.7MB in the beginning and 355.5MB in the end (delta: 59.8MB). Free memory was 261.2MB in the beginning and 244.4MB in the end (delta: 16.8MB). Peak memory consumption was 77.1MB. 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: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was analyzing trace of length 45 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 77.9s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 248 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 244 mSDsluCounter, 831 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 124 IncrementalHoareTripleChecker+Unchecked, 692 mSDsCounter, 112 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1171 IncrementalHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 112 mSolverCounterUnsat, 139 mSDtfsCounter, 1171 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=4, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 273 ConstructedInterpolants, 2 QuantifiedInterpolants, 2440 SizeOfPredicates, 23 NumberOfNonLiveVariables, 443 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 32/51 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