/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 03:53:13,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 03:53:13,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 03:53:13,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 03:53:13,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 03:53:13,380 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 03:53:13,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 03:53:13,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 03:53:13,382 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 03:53:13,384 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 03:53:13,385 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 03:53:13,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 03:53:13,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 03:53:13,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 03:53:13,387 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 03:53:13,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 03:53:13,387 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 03:53:13,387 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 03:53:13,387 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 03:53:13,388 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 03:53:13,389 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 03:53:13,389 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 03:53:13,389 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 03:53:13,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 03:53:13,389 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 03:53:13,390 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 03:53:13,390 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 03:53:13,390 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 03:53:13,390 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 03:53:13,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 03:53:13,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 03:53:13,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 03:53:13,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:53:13,392 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 03:53:13,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 03:53:13,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 03:53:13,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 03:53:13,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 03:53:13,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 03:53:13,393 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 03:53:13,393 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 03:53:13,393 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 03:53:13,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 03:53:13,393 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 03:53:13,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 03:53:13,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 03:53:13,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 03:53:13,570 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 03:53:13,570 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 03:53:13,571 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2023-12-21 03:53:14,597 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 03:53:14,785 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 03:53:14,785 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2023-12-21 03:53:14,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85858524a/765d885138d642bf9c691d5101944e45/FLAGea8e01e7c [2023-12-21 03:53:14,804 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85858524a/765d885138d642bf9c691d5101944e45 [2023-12-21 03:53:14,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 03:53:14,807 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 03:53:14,808 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 03:53:14,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 03:53:14,818 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 03:53:14,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:53:14" (1/1) ... [2023-12-21 03:53:14,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1fee88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:14, skipping insertion in model container [2023-12-21 03:53:14,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:53:14" (1/1) ... [2023-12-21 03:53:14,859 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 03:53:15,059 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i[23814,23827] [2023-12-21 03:53:15,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:53:15,071 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 03:53:15,101 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i[23814,23827] [2023-12-21 03:53:15,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 03:53:15,124 INFO L206 MainTranslator]: Completed translation [2023-12-21 03:53:15,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15 WrapperNode [2023-12-21 03:53:15,125 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 03:53:15,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 03:53:15,126 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 03:53:15,126 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 03:53:15,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,166 INFO L138 Inliner]: procedures = 125, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 89 [2023-12-21 03:53:15,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 03:53:15,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 03:53:15,167 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 03:53:15,167 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 03:53:15,173 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,185 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,194 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]. [2023-12-21 03:53:15,194 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,194 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,198 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,200 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,201 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 03:53:15,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 03:53:15,203 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 03:53:15,203 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 03:53:15,204 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (1/1) ... [2023-12-21 03:53:15,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 03:53:15,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:15,240 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) [2023-12-21 03:53:15,246 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 [2023-12-21 03:53:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-21 03:53:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 03:53:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-21 03:53:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-21 03:53:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-21 03:53:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-21 03:53:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 03:53:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 03:53:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 03:53:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 03:53:15,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 03:53:15,376 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 03:53:15,377 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 03:53:15,461 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 03:53:15,480 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 03:53:15,480 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-21 03:53:15,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:53:15 BoogieIcfgContainer [2023-12-21 03:53:15,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 03:53:15,482 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 03:53:15,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 03:53:15,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 03:53:15,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:53:14" (1/3) ... [2023-12-21 03:53:15,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4ac8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:53:15, skipping insertion in model container [2023-12-21 03:53:15,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:53:15" (2/3) ... [2023-12-21 03:53:15,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4ac8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:53:15, skipping insertion in model container [2023-12-21 03:53:15,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:53:15" (3/3) ... [2023-12-21 03:53:15,486 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2023-12-21 03:53:15,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 03:53:15,498 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 03:53:15,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 03:53:15,529 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;@44ed4d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 03:53:15,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 03:53:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-21 03:53:15,535 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:15,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:15,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:15,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:15,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1273996892, now seen corresponding path program 1 times [2023-12-21 03:53:15,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:15,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507716069] [2023-12-21 03:53:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:15,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:53:15,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:15,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507716069] [2023-12-21 03:53:15,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507716069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:53:15,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:53:15,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 03:53:15,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498749999] [2023-12-21 03:53:15,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:53:15,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 03:53:15,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:15,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 03:53:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 03:53:15,651 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:15,685 INFO L93 Difference]: Finished difference Result 32 states and 49 transitions. [2023-12-21 03:53:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 03:53:15,687 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-21 03:53:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:15,692 INFO L225 Difference]: With dead ends: 32 [2023-12-21 03:53:15,692 INFO L226 Difference]: Without dead ends: 13 [2023-12-21 03:53:15,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 03:53:15,696 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:15,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:53:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-21 03:53:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-21 03:53:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-12-21 03:53:15,716 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2023-12-21 03:53:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:15,716 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-12-21 03:53:15,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-12-21 03:53:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 03:53:15,717 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:15,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:15,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 03:53:15,718 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:15,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1518236623, now seen corresponding path program 1 times [2023-12-21 03:53:15,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:15,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123287876] [2023-12-21 03:53:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:15,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:53:15,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:15,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123287876] [2023-12-21 03:53:15,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123287876] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:53:15,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:53:15,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 03:53:15,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733005764] [2023-12-21 03:53:15,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:53:15,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 03:53:15,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 03:53:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 03:53:15,868 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:15,896 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2023-12-21 03:53:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 03:53:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-21 03:53:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:15,898 INFO L225 Difference]: With dead ends: 21 [2023-12-21 03:53:15,898 INFO L226 Difference]: Without dead ends: 15 [2023-12-21 03:53:15,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-21 03:53:15,899 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:15,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 13 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:53:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-21 03:53:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-12-21 03:53:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-12-21 03:53:15,907 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2023-12-21 03:53:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:15,907 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-12-21 03:53:15,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-12-21 03:53:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-21 03:53:15,908 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:15,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:15,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 03:53:15,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:15,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:15,910 INFO L85 PathProgramCache]: Analyzing trace with hash 679534761, now seen corresponding path program 1 times [2023-12-21 03:53:15,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:15,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131389824] [2023-12-21 03:53:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:15,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:53:16,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:16,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131389824] [2023-12-21 03:53:16,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131389824] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:53:16,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 03:53:16,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 03:53:16,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386106093] [2023-12-21 03:53:16,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:53:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 03:53:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 03:53:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 03:53:16,061 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:16,090 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-12-21 03:53:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 03:53:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-21 03:53:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:16,092 INFO L225 Difference]: With dead ends: 20 [2023-12-21 03:53:16,092 INFO L226 Difference]: Without dead ends: 16 [2023-12-21 03:53:16,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 03:53:16,097 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:16,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:53:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-21 03:53:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2023-12-21 03:53:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-21 03:53:16,101 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 13 [2023-12-21 03:53:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:16,101 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-21 03:53:16,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-21 03:53:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-21 03:53:16,101 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:16,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:16,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 03:53:16,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:16,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:16,102 INFO L85 PathProgramCache]: Analyzing trace with hash -408403085, now seen corresponding path program 1 times [2023-12-21 03:53:16,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:16,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440263856] [2023-12-21 03:53:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:16,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:53:16,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:16,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440263856] [2023-12-21 03:53:16,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440263856] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:53:16,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981627193] [2023-12-21 03:53:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:16,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:16,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:16,264 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) [2023-12-21 03:53:16,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 03:53:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:16,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 03:53:16,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:53:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:53:16,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:53:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 03:53:16,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981627193] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:53:16,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:53:16,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-12-21 03:53:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205387709] [2023-12-21 03:53:16,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:53:16,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 03:53:16,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 03:53:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-21 03:53:16,432 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:16,460 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-12-21 03:53:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 03:53:16,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-21 03:53:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:16,462 INFO L225 Difference]: With dead ends: 24 [2023-12-21 03:53:16,462 INFO L226 Difference]: Without dead ends: 17 [2023-12-21 03:53:16,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-21 03:53:16,469 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:16,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 13 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:53:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-21 03:53:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-21 03:53:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-12-21 03:53:16,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2023-12-21 03:53:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:16,478 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-12-21 03:53:16,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-12-21 03:53:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-21 03:53:16,480 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:16,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:16,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 03:53:16,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:16,685 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:16,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1944154201, now seen corresponding path program 2 times [2023-12-21 03:53:16,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:16,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801420664] [2023-12-21 03:53:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:16,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:53:16,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:16,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801420664] [2023-12-21 03:53:16,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801420664] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:53:16,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181826216] [2023-12-21 03:53:16,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:53:16,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:16,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:16,850 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) [2023-12-21 03:53:16,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 03:53:16,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:53:16,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:53:16,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-21 03:53:16,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:53:16,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:53:17,034 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 16 treesize of output 8 [2023-12-21 03:53:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:53:17,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:53:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:53:17,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181826216] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:53:17,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:53:17,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10 [2023-12-21 03:53:17,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802409144] [2023-12-21 03:53:17,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:53:17,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 03:53:17,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:17,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 03:53:17,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-21 03:53:17,067 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:17,136 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-12-21 03:53:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 03:53:17,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-21 03:53:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:17,136 INFO L225 Difference]: With dead ends: 23 [2023-12-21 03:53:17,137 INFO L226 Difference]: Without dead ends: 19 [2023-12-21 03:53:17,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-21 03:53:17,137 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:17,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:53:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-21 03:53:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-12-21 03:53:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-21 03:53:17,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 16 [2023-12-21 03:53:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:17,140 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-21 03:53:17,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-21 03:53:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-21 03:53:17,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:17,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:17,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 03:53:17,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:17,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:17,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash 140093891, now seen corresponding path program 3 times [2023-12-21 03:53:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:17,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189363825] [2023-12-21 03:53:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 03:53:17,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:17,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189363825] [2023-12-21 03:53:17,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189363825] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:53:17,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616165779] [2023-12-21 03:53:17,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 03:53:17,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:17,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:17,462 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) [2023-12-21 03:53:17,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 03:53:17,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-21 03:53:17,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:53:17,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-21 03:53:17,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:53:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 03:53:17,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:53:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 03:53:17,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616165779] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:53:17,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:53:17,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-12-21 03:53:17,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615993586] [2023-12-21 03:53:17,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:53:17,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 03:53:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:17,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 03:53:17,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-21 03:53:17,648 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:17,690 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-12-21 03:53:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 03:53:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-21 03:53:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:17,690 INFO L225 Difference]: With dead ends: 40 [2023-12-21 03:53:17,690 INFO L226 Difference]: Without dead ends: 36 [2023-12-21 03:53:17,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-21 03:53:17,691 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:17,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 64 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:53:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-21 03:53:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-12-21 03:53:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-12-21 03:53:17,695 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 17 [2023-12-21 03:53:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:17,695 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-12-21 03:53:17,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-12-21 03:53:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 03:53:17,696 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:17,696 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:17,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 03:53:17,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:17,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:17,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:17,901 INFO L85 PathProgramCache]: Analyzing trace with hash 48799129, now seen corresponding path program 4 times [2023-12-21 03:53:17,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:17,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743064002] [2023-12-21 03:53:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:17,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:53:18,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:18,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743064002] [2023-12-21 03:53:18,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743064002] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:53:18,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104512887] [2023-12-21 03:53:18,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 03:53:18,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:18,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:18,144 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) [2023-12-21 03:53:18,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 03:53:18,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 03:53:18,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:53:18,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-21 03:53:18,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:53:18,237 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 [2023-12-21 03:53:18,261 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 [2023-12-21 03:53:18,265 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 [2023-12-21 03:53:18,301 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-21 03:53:18,301 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 11 treesize of output 11 [2023-12-21 03:53:18,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-21 03:53:18,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-21 03:53:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:53:18,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:53:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 03:53:38,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104512887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:53:38,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:53:38,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-12-21 03:53:38,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408859534] [2023-12-21 03:53:38,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:53:38,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 03:53:38,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 03:53:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=288, Unknown=5, NotChecked=0, Total=342 [2023-12-21 03:53:38,713 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:38,836 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2023-12-21 03:53:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 03:53:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-21 03:53:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:38,837 INFO L225 Difference]: With dead ends: 48 [2023-12-21 03:53:38,837 INFO L226 Difference]: Without dead ends: 39 [2023-12-21 03:53:38,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=57, Invalid=318, Unknown=5, NotChecked=0, Total=380 [2023-12-21 03:53:38,838 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:38,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 121 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:53:38,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-21 03:53:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-12-21 03:53:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-12-21 03:53:38,843 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 18 [2023-12-21 03:53:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:38,843 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-12-21 03:53:38,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-12-21 03:53:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 03:53:38,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:38,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:38,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-21 03:53:39,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:39,046 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:39,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1129637759, now seen corresponding path program 5 times [2023-12-21 03:53:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:39,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053618375] [2023-12-21 03:53:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:39,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:53:39,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:39,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053618375] [2023-12-21 03:53:39,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053618375] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:53:39,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962320016] [2023-12-21 03:53:39,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 03:53:39,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:39,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:39,146 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) [2023-12-21 03:53:39,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 03:53:39,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-21 03:53:39,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:53:39,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-21 03:53:39,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:53:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 03:53:39,254 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 03:53:39,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962320016] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 03:53:39,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 03:53:39,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-12-21 03:53:39,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12665897] [2023-12-21 03:53:39,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 03:53:39,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 03:53:39,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 03:53:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-21 03:53:39,255 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:39,301 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-12-21 03:53:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 03:53:39,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-21 03:53:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:39,331 INFO L225 Difference]: With dead ends: 44 [2023-12-21 03:53:39,331 INFO L226 Difference]: Without dead ends: 27 [2023-12-21 03:53:39,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-12-21 03:53:39,332 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:39,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:53:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-21 03:53:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-21 03:53:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-12-21 03:53:39,336 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2023-12-21 03:53:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:39,336 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-12-21 03:53:39,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-12-21 03:53:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 03:53:39,337 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:39,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:39,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 03:53:39,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:39,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:39,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1745665370, now seen corresponding path program 1 times [2023-12-21 03:53:39,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:39,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586556539] [2023-12-21 03:53:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:39,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:53:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586556539] [2023-12-21 03:53:39,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586556539] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:53:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068891180] [2023-12-21 03:53:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:39,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:39,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:39,612 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) [2023-12-21 03:53:39,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 03:53:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:39,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-21 03:53:39,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:53:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:53:39,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:53:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:53:39,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068891180] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:53:39,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:53:39,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-12-21 03:53:39,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295630869] [2023-12-21 03:53:39,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:53:39,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 03:53:39,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 03:53:39,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-21 03:53:39,744 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:39,782 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-12-21 03:53:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 03:53:39,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-21 03:53:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:39,783 INFO L225 Difference]: With dead ends: 31 [2023-12-21 03:53:39,783 INFO L226 Difference]: Without dead ends: 23 [2023-12-21 03:53:39,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-12-21 03:53:39,785 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:39,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 03:53:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-21 03:53:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-21 03:53:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-12-21 03:53:39,790 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 20 [2023-12-21 03:53:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:39,790 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-12-21 03:53:39,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-12-21 03:53:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-21 03:53:39,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:39,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:39,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 03:53:39,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:39,996 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:39,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash 159414080, now seen corresponding path program 2 times [2023-12-21 03:53:39,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:39,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296114003] [2023-12-21 03:53:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:39,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:53:40,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296114003] [2023-12-21 03:53:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296114003] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:53:40,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141113273] [2023-12-21 03:53:40,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 03:53:40,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:40,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:40,308 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) [2023-12-21 03:53:40,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 03:53:40,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 03:53:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:53:40,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-21 03:53:40,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:53:40,395 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 [2023-12-21 03:53:40,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 03:53:40,453 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-21 03:53:40,453 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 11 treesize of output 11 [2023-12-21 03:53:40,481 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 [2023-12-21 03:53:40,486 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 28 treesize of output 16 [2023-12-21 03:53:40,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-21 03:53:40,594 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-21 03:53:40,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-12-21 03:53:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:53:40,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:53:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:53:40,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141113273] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:53:40,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:53:40,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-12-21 03:53:40,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370382184] [2023-12-21 03:53:40,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:53:40,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 03:53:40,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:40,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 03:53:40,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-12-21 03:53:40,730 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:40,926 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-12-21 03:53:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 03:53:40,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-21 03:53:40,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:40,927 INFO L225 Difference]: With dead ends: 29 [2023-12-21 03:53:40,927 INFO L226 Difference]: Without dead ends: 25 [2023-12-21 03:53:40,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-12-21 03:53:40,928 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:40,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:53:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-21 03:53:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-12-21 03:53:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-21 03:53:40,930 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 22 [2023-12-21 03:53:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:40,930 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-21 03:53:40,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-21 03:53:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 03:53:40,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:40,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:40,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 03:53:41,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:41,137 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:41,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash 647724988, now seen corresponding path program 3 times [2023-12-21 03:53:41,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:41,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118204435] [2023-12-21 03:53:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 03:53:41,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:41,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118204435] [2023-12-21 03:53:41,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118204435] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:53:41,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304797797] [2023-12-21 03:53:41,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 03:53:41,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:41,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:41,225 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) [2023-12-21 03:53:41,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 03:53:41,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 03:53:41,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:53:41,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 03:53:41,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:53:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 03:53:41,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 03:53:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 03:53:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304797797] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 03:53:41,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 03:53:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-12-21 03:53:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460967809] [2023-12-21 03:53:41,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 03:53:41,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 03:53:41,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 03:53:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 03:53:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-12-21 03:53:41,438 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 03:53:41,551 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-12-21 03:53:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 03:53:41,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-21 03:53:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 03:53:41,552 INFO L225 Difference]: With dead ends: 49 [2023-12-21 03:53:41,552 INFO L226 Difference]: Without dead ends: 45 [2023-12-21 03:53:41,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-12-21 03:53:41,553 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 03:53:41,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 03:53:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-21 03:53:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2023-12-21 03:53:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-12-21 03:53:41,557 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 23 [2023-12-21 03:53:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 03:53:41,557 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-12-21 03:53:41,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 03:53:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-12-21 03:53:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 03:53:41,557 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 03:53:41,557 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 03:53:41,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-21 03:53:41,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 03:53:41,764 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 03:53:41,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 03:53:41,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1394506048, now seen corresponding path program 4 times [2023-12-21 03:53:41,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 03:53:41,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348353005] [2023-12-21 03:53:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 03:53:41,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 03:53:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 03:53:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 03:53:42,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 03:53:42,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348353005] [2023-12-21 03:53:42,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348353005] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 03:53:42,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515814365] [2023-12-21 03:53:42,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 03:53:42,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 03:53:42,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 03:53:42,367 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 03:53:42,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 03:53:42,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 03:53:42,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 03:53:42,464 WARN L260 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-21 03:53:42,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 03:53:42,495 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 [2023-12-21 03:53:42,511 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 [2023-12-21 03:53:42,516 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 [2023-12-21 03:53:42,540 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-21 03:53:42,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-21 03:53:42,580 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 23 treesize of output 22 [2023-12-21 03:53:42,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-21 03:53:42,629 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-21 03:53:42,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-21 03:53:42,705 INFO L349 Elim1Store]: treesize reduction 56, result has 32.5 percent of original size [2023-12-21 03:53:42,705 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 52 [2023-12-21 03:53:42,716 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-12-21 03:53:42,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-12-21 03:53:43,198 INFO L349 Elim1Store]: treesize reduction 60, result has 70.1 percent of original size [2023-12-21 03:53:43,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 155 treesize of output 255 [2023-12-21 03:55:29,127 WARN L293 SmtUtils]: Spent 1.72m on a formula simplification. DAG size of input: 5005 DAG size of output: 4829 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-21 03:55:29,129 INFO L349 Elim1Store]: treesize reduction 540, result has 94.6 percent of original size [2023-12-21 03:55:29,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 50 select indices, 50 select index equivalence classes, 0 disjoint index pairs (out of 1225 index pairs), introduced 75 new quantified variables, introduced 1225 case distinctions, treesize of input 635 treesize of output 9782 [2023-12-21 04:02:38,467 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-21 04:02:38,468 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-12-21 04:02:38,474 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 101 [2023-12-21 04:02:38,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 04:02:38,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 04:02:38,669 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:495) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:298) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 59 more [2023-12-21 04:02:38,673 INFO L158 Benchmark]: Toolchain (without parser) took 563866.18ms. Allocated memory was 229.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 173.8MB in the beginning and 599.2MB in the end (delta: -425.3MB). Peak memory consumption was 825.7MB. Max. memory is 8.0GB. [2023-12-21 04:02:38,673 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 168.8MB. Free memory is still 122.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 04:02:38,673 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.76ms. Allocated memory is still 229.6MB. Free memory was 173.8MB in the beginning and 156.0MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-21 04:02:38,673 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.80ms. Allocated memory is still 229.6MB. Free memory was 156.0MB in the beginning and 153.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 04:02:38,674 INFO L158 Benchmark]: Boogie Preprocessor took 35.29ms. Allocated memory is still 229.6MB. Free memory was 153.9MB in the beginning and 151.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 04:02:38,674 INFO L158 Benchmark]: RCFGBuilder took 277.63ms. Allocated memory is still 229.6MB. Free memory was 151.8MB in the beginning and 137.7MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-21 04:02:38,674 INFO L158 Benchmark]: TraceAbstraction took 563190.50ms. Allocated memory was 229.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 136.6MB in the beginning and 599.2MB in the end (delta: -462.6MB). Peak memory consumption was 789.0MB. Max. memory is 8.0GB. [2023-12-21 04:02:38,675 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 168.8MB. Free memory is still 122.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 317.76ms. Allocated memory is still 229.6MB. Free memory was 173.8MB in the beginning and 156.0MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.80ms. Allocated memory is still 229.6MB. Free memory was 156.0MB in the beginning and 153.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.29ms. Allocated memory is still 229.6MB. Free memory was 153.9MB in the beginning and 151.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 277.63ms. Allocated memory is still 229.6MB. Free memory was 151.8MB in the beginning and 137.7MB in the end (delta: 14.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 563190.50ms. Allocated memory was 229.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 136.6MB in the beginning and 599.2MB in the end (delta: -462.6MB). Peak memory consumption was 789.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...