/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-crafted/xor5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 19:26:30,781 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 19:26:30,816 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 19:26:30,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 19:26:30,819 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 19:26:30,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 19:26:30,833 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 19:26:30,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 19:26:30,833 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 19:26:30,834 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 19:26:30,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 19:26:30,834 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 19:26:30,834 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 19:26:30,835 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 19:26:30,835 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 19:26:30,835 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 19:26:30,835 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 19:26:30,836 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 19:26:30,836 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 19:26:30,836 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 19:26:30,836 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 19:26:30,836 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 19:26:30,837 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 19:26:30,837 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 19:26:30,837 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 19:26:30,837 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 19:26:30,837 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 19:26:30,838 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 19:26:30,838 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 19:26:30,838 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 19:26:30,838 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 19:26:30,838 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 19:26:30,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:26:30,839 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 19:26:30,839 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 19:26:30,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 19:26:30,839 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 19:26:30,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 19:26:30,839 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 19:26:30,840 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 19:26:30,840 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 19:26:30,840 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 19:26:30,840 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 19:26:30,840 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 19:26:31,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 19:26:31,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 19:26:31,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 19:26:31,051 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 19:26:31,051 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 19:26:31,052 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor5.i [2023-12-18 19:26:32,182 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 19:26:32,328 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 19:26:32,328 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor5.i [2023-12-18 19:26:32,333 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c08118c/10c8925cca0645409382566715d83f2c/FLAGb5cd3da3b [2023-12-18 19:26:32,343 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c08118c/10c8925cca0645409382566715d83f2c [2023-12-18 19:26:32,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 19:26:32,345 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 19:26:32,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 19:26:32,346 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 19:26:32,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 19:26:32,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36372758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32, skipping insertion in model container [2023-12-18 19:26:32,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,363 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 19:26:32,493 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor5.i[1364,1377] [2023-12-18 19:26:32,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:26:32,503 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 19:26:32,516 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor5.i[1364,1377] [2023-12-18 19:26:32,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 19:26:32,529 INFO L206 MainTranslator]: Completed translation [2023-12-18 19:26:32,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32 WrapperNode [2023-12-18 19:26:32,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 19:26:32,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 19:26:32,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 19:26:32,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 19:26:32,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,551 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2023-12-18 19:26:32,552 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 19:26:32,552 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 19:26:32,552 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 19:26:32,552 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 19:26:32,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,561 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,570 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2023-12-18 19:26:32,570 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,575 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,576 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,578 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 19:26:32,579 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 19:26:32,579 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 19:26:32,579 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 19:26:32,580 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (1/1) ... [2023-12-18 19:26:32,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 19:26:32,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:32,602 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) [2023-12-18 19:26:32,604 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 [2023-12-18 19:26:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 19:26:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 19:26:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 19:26:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 19:26:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 19:26:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 19:26:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 19:26:32,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 19:26:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 19:26:32,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 19:26:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 19:26:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 19:26:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 19:26:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-12-18 19:26:32,622 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-12-18 19:26:32,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 19:26:32,680 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 19:26:32,682 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 19:26:32,852 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 19:26:32,871 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 19:26:32,871 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 19:26:32,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:26:32 BoogieIcfgContainer [2023-12-18 19:26:32,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 19:26:32,873 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 19:26:32,873 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 19:26:32,875 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 19:26:32,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:26:32" (1/3) ... [2023-12-18 19:26:32,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ecc8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:26:32, skipping insertion in model container [2023-12-18 19:26:32,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:26:32" (2/3) ... [2023-12-18 19:26:32,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ecc8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:26:32, skipping insertion in model container [2023-12-18 19:26:32,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:26:32" (3/3) ... [2023-12-18 19:26:32,876 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2023-12-18 19:26:32,888 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 19:26:32,889 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 19:26:32,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 19:26:32,920 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;@7f88dab7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 19:26:32,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 19:26:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:26:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 19:26:32,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:32,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:26:32,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:32,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:32,938 INFO L85 PathProgramCache]: Analyzing trace with hash 482008589, now seen corresponding path program 1 times [2023-12-18 19:26:32,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:32,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765153312] [2023-12-18 19:26:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:32,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:26:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-18 19:26:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-18 19:26:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:26:33,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:33,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765153312] [2023-12-18 19:26:33,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765153312] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:26:33,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:26:33,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 19:26:33,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227945284] [2023-12-18 19:26:33,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:26:33,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 19:26:33,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:33,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 19:26:33,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 19:26:33,194 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:26:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:33,219 INFO L93 Difference]: Finished difference Result 49 states and 73 transitions. [2023-12-18 19:26:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 19:26:33,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-12-18 19:26:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:33,227 INFO L225 Difference]: With dead ends: 49 [2023-12-18 19:26:33,227 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 19:26:33,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 19:26:33,232 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:33,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 19:26:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-18 19:26:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:26:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-12-18 19:26:33,255 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 26 [2023-12-18 19:26:33,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:33,255 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-12-18 19:26:33,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:26:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-12-18 19:26:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 19:26:33,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:33,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:26:33,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 19:26:33,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:33,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash 960628734, now seen corresponding path program 1 times [2023-12-18 19:26:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:33,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952107861] [2023-12-18 19:26:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:33,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-18 19:26:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-18 19:26:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-18 19:26:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:26:33,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952107861] [2023-12-18 19:26:33,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952107861] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:26:33,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 19:26:33,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 19:26:33,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813474698] [2023-12-18 19:26:33,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:26:33,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 19:26:33,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 19:26:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 19:26:33,385 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:26:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:33,415 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-12-18 19:26:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 19:26:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-12-18 19:26:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:33,416 INFO L225 Difference]: With dead ends: 44 [2023-12-18 19:26:33,416 INFO L226 Difference]: Without dead ends: 24 [2023-12-18 19:26:33,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 19:26:33,419 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:33,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:33,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-18 19:26:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-18 19:26:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:26:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-12-18 19:26:33,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 26 [2023-12-18 19:26:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:33,425 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-12-18 19:26:33,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-18 19:26:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-12-18 19:26:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 19:26:33,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:33,426 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:26:33,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 19:26:33,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:33,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash -74786828, now seen corresponding path program 1 times [2023-12-18 19:26:33,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:33,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356587785] [2023-12-18 19:26:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:33,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-12-18 19:26:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-12-18 19:26:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-18 19:26:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 19:26:33,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356587785] [2023-12-18 19:26:33,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356587785] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732234688] [2023-12-18 19:26:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:33,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:33,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:33,602 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) [2023-12-18 19:26:33,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 19:26:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:33,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 19:26:33,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:26:33,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:26:33,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732234688] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:33,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:33,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-12-18 19:26:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944637077] [2023-12-18 19:26:33,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:33,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 19:26:33,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:33,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 19:26:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-18 19:26:33,776 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-18 19:26:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:33,860 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2023-12-18 19:26:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 19:26:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 27 [2023-12-18 19:26:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:33,862 INFO L225 Difference]: With dead ends: 50 [2023-12-18 19:26:33,862 INFO L226 Difference]: Without dead ends: 30 [2023-12-18 19:26:33,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-18 19:26:33,865 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:33,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 88 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:26:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-18 19:26:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2023-12-18 19:26:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:26:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-18 19:26:33,871 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 27 [2023-12-18 19:26:33,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:33,872 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-18 19:26:33,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-18 19:26:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-18 19:26:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 19:26:33,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:33,874 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:26:33,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 19:26:34,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:34,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:34,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1859172000, now seen corresponding path program 1 times [2023-12-18 19:26:34,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:34,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118496143] [2023-12-18 19:26:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:34,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:34,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:26:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:34,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:26:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:34,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-18 19:26:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 19:26:34,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:34,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118496143] [2023-12-18 19:26:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118496143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:34,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877248337] [2023-12-18 19:26:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:34,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:34,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:34,246 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) [2023-12-18 19:26:34,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 19:26:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:34,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-18 19:26:34,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 19:26:34,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 19:26:34,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877248337] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 19:26:34,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-18 19:26:34,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-12-18 19:26:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541176849] [2023-12-18 19:26:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 19:26:34,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 19:26:34,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 19:26:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-18 19:26:34,381 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:26:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:34,411 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2023-12-18 19:26:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 19:26:34,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-12-18 19:26:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:34,413 INFO L225 Difference]: With dead ends: 42 [2023-12-18 19:26:34,413 INFO L226 Difference]: Without dead ends: 27 [2023-12-18 19:26:34,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-18 19:26:34,415 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:34,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 19:26:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-18 19:26:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-18 19:26:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-18 19:26:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-12-18 19:26:34,421 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 37 [2023-12-18 19:26:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:34,422 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-12-18 19:26:34,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-18 19:26:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-12-18 19:26:34,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 19:26:34,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:34,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:26:34,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 19:26:34,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-18 19:26:34,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:34,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1562382107, now seen corresponding path program 1 times [2023-12-18 19:26:34,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:34,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260708493] [2023-12-18 19:26:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:34,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:35,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:26:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:36,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:26:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:36,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-18 19:26:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 19:26:36,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:36,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260708493] [2023-12-18 19:26:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260708493] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980173709] [2023-12-18 19:26:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:36,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:36,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:36,658 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) [2023-12-18 19:26:36,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 19:26:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:36,738 WARN L260 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 98 conjunts are in the unsatisfiable core [2023-12-18 19:26:36,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:36,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:26:37,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:26:37,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 43 [2023-12-18 19:26:37,663 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 19:26:37,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2023-12-18 19:26:37,723 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 [2023-12-18 19:26:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 19:26:38,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:38,481 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 45 treesize of output 41 [2023-12-18 19:26:38,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2023-12-18 19:26:38,499 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 43 treesize of output 39 [2023-12-18 19:26:38,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2023-12-18 19:26:39,723 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 33 treesize of output 29 [2023-12-18 19:26:39,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:26:39,727 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 43 treesize of output 37 [2023-12-18 19:26:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:26:39,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980173709] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:39,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:39,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 28] total 81 [2023-12-18 19:26:39,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632860586] [2023-12-18 19:26:39,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:39,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-12-18 19:26:39,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:39,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-12-18 19:26:39,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=6037, Unknown=0, NotChecked=0, Total=6480 [2023-12-18 19:26:39,822 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 81 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 70 states have internal predecessors, (90), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-18 19:26:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:50,127 INFO L93 Difference]: Finished difference Result 330 states and 492 transitions. [2023-12-18 19:26:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2023-12-18 19:26:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 70 states have internal predecessors, (90), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 38 [2023-12-18 19:26:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:50,132 INFO L225 Difference]: With dead ends: 330 [2023-12-18 19:26:50,132 INFO L226 Difference]: Without dead ends: 324 [2023-12-18 19:26:50,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12996 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3927, Invalid=37079, Unknown=0, NotChecked=0, Total=41006 [2023-12-18 19:26:50,152 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 808 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 5341 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 5586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 5341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:50,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 364 Invalid, 5586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 5341 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-18 19:26:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-18 19:26:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 155. [2023-12-18 19:26:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 133 states have (on average 1.5413533834586466) internal successors, (205), 140 states have internal predecessors, (205), 12 states have call successors, (12), 3 states have call predecessors, (12), 9 states have return successors, (36), 11 states have call predecessors, (36), 12 states have call successors, (36) [2023-12-18 19:26:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 253 transitions. [2023-12-18 19:26:50,191 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 253 transitions. Word has length 38 [2023-12-18 19:26:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:50,191 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 253 transitions. [2023-12-18 19:26:50,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 70 states have internal predecessors, (90), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-18 19:26:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 253 transitions. [2023-12-18 19:26:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 19:26:50,194 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:50,194 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:26:50,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 19:26:50,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:50,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:50,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash 395484689, now seen corresponding path program 2 times [2023-12-18 19:26:50,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:50,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242362491] [2023-12-18 19:26:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:50,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:50,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-18 19:26:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:50,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:26:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:26:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 19:26:50,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:50,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242362491] [2023-12-18 19:26:50,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242362491] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:50,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648915263] [2023-12-18 19:26:50,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:26:50,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:50,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:50,496 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) [2023-12-18 19:26:50,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 19:26:50,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:26:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:50,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 19:26:50,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-18 19:26:50,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 19:26:50,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648915263] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:50,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:50,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2023-12-18 19:26:50,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164755239] [2023-12-18 19:26:50,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:50,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 19:26:50,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:50,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 19:26:50,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-18 19:26:50,663 INFO L87 Difference]: Start difference. First operand 155 states and 253 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:26:50,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:50,806 INFO L93 Difference]: Finished difference Result 351 states and 587 transitions. [2023-12-18 19:26:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 19:26:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-12-18 19:26:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:50,812 INFO L225 Difference]: With dead ends: 351 [2023-12-18 19:26:50,812 INFO L226 Difference]: Without dead ends: 331 [2023-12-18 19:26:50,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-12-18 19:26:50,814 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 87 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:50,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 368 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:26:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-12-18 19:26:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 291. [2023-12-18 19:26:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 267 states have internal predecessors, (398), 19 states have call successors, (19), 5 states have call predecessors, (19), 17 states have return successors, (84), 18 states have call predecessors, (84), 19 states have call successors, (84) [2023-12-18 19:26:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 501 transitions. [2023-12-18 19:26:50,858 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 501 transitions. Word has length 39 [2023-12-18 19:26:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:50,859 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 501 transitions. [2023-12-18 19:26:50,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-18 19:26:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 501 transitions. [2023-12-18 19:26:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 19:26:50,873 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:50,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:26:50,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 19:26:51,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:51,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:51,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2039545481, now seen corresponding path program 1 times [2023-12-18 19:26:51,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:51,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20356373] [2023-12-18 19:26:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:51,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:51,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:26:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:26:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:51,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-12-18 19:26:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 19:26:51,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:51,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20356373] [2023-12-18 19:26:51,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20356373] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:51,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101983336] [2023-12-18 19:26:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:51,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:51,435 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) [2023-12-18 19:26:51,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 19:26:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:51,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-18 19:26:51,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:51,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:26:51,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-12-18 19:26:51,723 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 19:26:51,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-12-18 19:26:51,779 INFO L349 Elim1Store]: treesize reduction 64, result has 25.6 percent of original size [2023-12-18 19:26:51,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 42 [2023-12-18 19:26:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 19:26:51,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:52,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101983336] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:52,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 19:26:52,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2023-12-18 19:26:52,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761942661] [2023-12-18 19:26:52,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:52,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 19:26:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:52,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 19:26:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 19:26:52,134 INFO L87 Difference]: Start difference. First operand 291 states and 501 transitions. Second operand has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 22 states have internal predecessors, (58), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-18 19:26:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:26:52,775 INFO L93 Difference]: Finished difference Result 948 states and 1523 transitions. [2023-12-18 19:26:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-18 19:26:52,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 22 states have internal predecessors, (58), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2023-12-18 19:26:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:26:52,778 INFO L225 Difference]: With dead ends: 948 [2023-12-18 19:26:52,778 INFO L226 Difference]: Without dead ends: 825 [2023-12-18 19:26:52,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=2003, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 19:26:52,781 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 131 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:26:52,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 373 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:26:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2023-12-18 19:26:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 573. [2023-12-18 19:26:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 504 states have (on average 1.5317460317460319) internal successors, (772), 526 states have internal predecessors, (772), 32 states have call successors, (32), 15 states have call predecessors, (32), 36 states have return successors, (133), 31 states have call predecessors, (133), 32 states have call successors, (133) [2023-12-18 19:26:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 937 transitions. [2023-12-18 19:26:52,835 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 937 transitions. Word has length 39 [2023-12-18 19:26:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:26:52,835 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 937 transitions. [2023-12-18 19:26:52,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 22 states have internal predecessors, (58), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-18 19:26:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 937 transitions. [2023-12-18 19:26:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 19:26:52,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:26:52,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:26:52,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 19:26:53,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:53,043 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:26:53,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:26:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1225906013, now seen corresponding path program 2 times [2023-12-18 19:26:53,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:26:53,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750950709] [2023-12-18 19:26:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:26:53,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:26:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:54,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:26:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:54,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:26:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:54,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:26:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:26:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 19:26:54,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:26:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750950709] [2023-12-18 19:26:54,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750950709] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:26:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698035405] [2023-12-18 19:26:54,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:26:54,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:26:54,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:26:54,753 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) [2023-12-18 19:26:54,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 19:26:54,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:26:54,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:26:54,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 84 conjunts are in the unsatisfiable core [2023-12-18 19:26:54,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:26:54,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:26:55,220 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 64 treesize of output 33 [2023-12-18 19:26:55,595 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 90 treesize of output 54 [2023-12-18 19:26:55,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:26:56,019 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 124 treesize of output 76 [2023-12-18 19:26:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 19:26:56,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:26:56,441 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 45 treesize of output 41 [2023-12-18 19:26:56,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2023-12-18 19:26:56,458 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 43 treesize of output 39 [2023-12-18 19:26:56,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2023-12-18 19:26:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 19:26:57,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698035405] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:26:57,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:26:57,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 26] total 66 [2023-12-18 19:26:57,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210051676] [2023-12-18 19:26:57,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:26:57,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-12-18 19:26:57,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:26:57,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-12-18 19:26:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=3982, Unknown=0, NotChecked=0, Total=4290 [2023-12-18 19:26:57,456 INFO L87 Difference]: Start difference. First operand 573 states and 937 transitions. Second operand has 66 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 58 states have internal predecessors, (85), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-18 19:27:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:27:00,818 INFO L93 Difference]: Finished difference Result 906 states and 1457 transitions. [2023-12-18 19:27:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-18 19:27:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 58 states have internal predecessors, (85), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 39 [2023-12-18 19:27:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:27:00,825 INFO L225 Difference]: With dead ends: 906 [2023-12-18 19:27:00,825 INFO L226 Difference]: Without dead ends: 900 [2023-12-18 19:27:00,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=991, Invalid=11441, Unknown=0, NotChecked=0, Total=12432 [2023-12-18 19:27:00,828 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 306 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:27:00,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 249 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-18 19:27:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2023-12-18 19:27:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 593. [2023-12-18 19:27:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 521 states have (on average 1.5297504798464492) internal successors, (797), 544 states have internal predecessors, (797), 32 states have call successors, (32), 15 states have call predecessors, (32), 39 states have return successors, (141), 33 states have call predecessors, (141), 32 states have call successors, (141) [2023-12-18 19:27:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 970 transitions. [2023-12-18 19:27:00,886 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 970 transitions. Word has length 39 [2023-12-18 19:27:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:27:00,886 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 970 transitions. [2023-12-18 19:27:00,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 58 states have internal predecessors, (85), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-18 19:27:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 970 transitions. [2023-12-18 19:27:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 19:27:00,888 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:27:00,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:27:00,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 19:27:01,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:27:01,093 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:27:01,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:27:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash 781407011, now seen corresponding path program 3 times [2023-12-18 19:27:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:27:01,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258172501] [2023-12-18 19:27:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:27:01,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:27:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:27:01,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:27:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:27:01,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:27:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:27:01,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:27:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:27:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-18 19:27:01,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:27:01,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258172501] [2023-12-18 19:27:01,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258172501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:27:01,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878330745] [2023-12-18 19:27:01,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:27:01,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:27:01,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:27:01,409 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) [2023-12-18 19:27:01,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 19:27:01,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 19:27:01,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:27:01,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 19:27:01,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:27:01,581 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 8 treesize of output 1 [2023-12-18 19:27:01,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:27:01,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2023-12-18 19:27:01,758 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 24 treesize of output 19 [2023-12-18 19:27:01,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 19:27:01,794 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-18 19:27:01,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 26 [2023-12-18 19:27:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:27:01,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:27:10,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878330745] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:27:10,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 19:27:10,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2023-12-18 19:27:10,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507943881] [2023-12-18 19:27:10,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 19:27:10,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 19:27:10,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:27:10,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 19:27:10,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=892, Unknown=2, NotChecked=0, Total=1056 [2023-12-18 19:27:10,064 INFO L87 Difference]: Start difference. First operand 593 states and 970 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 24 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-18 19:27:14,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:18,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:22,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:26,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:30,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:34,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:38,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:42,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:46,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:50,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:54,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:27:58,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:02,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:06,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:10,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:12,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:16,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:20,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:24,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:28,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:32,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:36,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:40,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:44,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:47,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:51,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:55,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:28:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:28:55,719 INFO L93 Difference]: Finished difference Result 963 states and 1511 transitions. [2023-12-18 19:28:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-18 19:28:55,720 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 24 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2023-12-18 19:28:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:28:55,724 INFO L225 Difference]: With dead ends: 963 [2023-12-18 19:28:55,724 INFO L226 Difference]: Without dead ends: 882 [2023-12-18 19:28:55,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=378, Invalid=2170, Unknown=2, NotChecked=0, Total=2550 [2023-12-18 19:28:55,726 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 134 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 40 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:28:55,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 206 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 814 Invalid, 31 Unknown, 0 Unchecked, 105.3s Time] [2023-12-18 19:28:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-12-18 19:28:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 596. [2023-12-18 19:28:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 527 states have (on average 1.5351043643263758) internal successors, (809), 551 states have internal predecessors, (809), 29 states have call successors, (29), 19 states have call predecessors, (29), 39 states have return successors, (85), 25 states have call predecessors, (85), 29 states have call successors, (85) [2023-12-18 19:28:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 923 transitions. [2023-12-18 19:28:55,783 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 923 transitions. Word has length 39 [2023-12-18 19:28:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:28:55,783 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 923 transitions. [2023-12-18 19:28:55,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 24 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-18 19:28:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 923 transitions. [2023-12-18 19:28:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-18 19:28:55,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:28:55,785 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:28:55,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 19:28:55,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:28:55,991 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:28:55,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:28:55,991 INFO L85 PathProgramCache]: Analyzing trace with hash -695846015, now seen corresponding path program 4 times [2023-12-18 19:28:55,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:28:55,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269870879] [2023-12-18 19:28:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:28:55,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:28:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:28:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:28:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:28:57,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:28:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:28:57,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:28:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:28:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-18 19:28:57,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:28:57,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269870879] [2023-12-18 19:28:57,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269870879] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:28:57,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185821065] [2023-12-18 19:28:57,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 19:28:57,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:28:57,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:28:57,603 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) [2023-12-18 19:28:57,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 19:28:57,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 19:28:57,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:28:57,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-18 19:28:57,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:28:57,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:28:57,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 40 [2023-12-18 19:28:58,554 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-18 19:28:58,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 93 [2023-12-18 19:28:58,738 INFO L349 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2023-12-18 19:28:58,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 128 treesize of output 110 [2023-12-18 19:28:59,041 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 132 treesize of output 80 [2023-12-18 19:28:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:28:59,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:00,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185821065] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:00,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 19:29:00,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 48 [2023-12-18 19:29:00,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615144176] [2023-12-18 19:29:00,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:00,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-18 19:29:00,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-18 19:29:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2861, Unknown=0, NotChecked=0, Total=3080 [2023-12-18 19:29:00,588 INFO L87 Difference]: Start difference. First operand 596 states and 923 transitions. Second operand has 48 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 41 states have internal predecessors, (59), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-18 19:29:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:04,085 INFO L93 Difference]: Finished difference Result 1360 states and 2074 transitions. [2023-12-18 19:29:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-18 19:29:04,085 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 41 states have internal predecessors, (59), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2023-12-18 19:29:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:04,089 INFO L225 Difference]: With dead ends: 1360 [2023-12-18 19:29:04,089 INFO L226 Difference]: Without dead ends: 1099 [2023-12-18 19:29:04,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=856, Invalid=9650, Unknown=0, NotChecked=0, Total=10506 [2023-12-18 19:29:04,090 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 214 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:04,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 282 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2010 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-18 19:29:04,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2023-12-18 19:29:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 808. [2023-12-18 19:29:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 710 states have (on average 1.5070422535211268) internal successors, (1070), 750 states have internal predecessors, (1070), 40 states have call successors, (40), 23 states have call predecessors, (40), 57 states have return successors, (127), 34 states have call predecessors, (127), 40 states have call successors, (127) [2023-12-18 19:29:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1237 transitions. [2023-12-18 19:29:04,163 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1237 transitions. Word has length 40 [2023-12-18 19:29:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:04,165 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1237 transitions. [2023-12-18 19:29:04,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 41 states have internal predecessors, (59), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-18 19:29:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1237 transitions. [2023-12-18 19:29:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 19:29:04,167 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:04,167 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:04,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 19:29:04,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-18 19:29:04,373 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:04,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash 471426693, now seen corresponding path program 3 times [2023-12-18 19:29:04,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:04,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484066239] [2023-12-18 19:29:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:04,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:04,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:29:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:04,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-18 19:29:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:04,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-18 19:29:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-18 19:29:04,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:04,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484066239] [2023-12-18 19:29:04,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484066239] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:04,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196305226] [2023-12-18 19:29:04,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:29:04,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:04,467 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) [2023-12-18 19:29:04,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 19:29:04,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 19:29:04,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:04,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 19:29:04,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-18 19:29:04,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 19:29:04,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196305226] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:04,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:04,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 13 [2023-12-18 19:29:04,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758192030] [2023-12-18 19:29:04,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:04,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 19:29:04,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:04,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 19:29:04,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-18 19:29:04,706 INFO L87 Difference]: Start difference. First operand 808 states and 1237 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 19:29:04,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:04,880 INFO L93 Difference]: Finished difference Result 1024 states and 1537 transitions. [2023-12-18 19:29:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 19:29:04,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2023-12-18 19:29:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:04,881 INFO L225 Difference]: With dead ends: 1024 [2023-12-18 19:29:04,881 INFO L226 Difference]: Without dead ends: 376 [2023-12-18 19:29:04,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-12-18 19:29:04,883 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 107 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:04,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 301 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:29:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-12-18 19:29:04,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 301. [2023-12-18 19:29:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 258 states have (on average 1.321705426356589) internal successors, (341), 270 states have internal predecessors, (341), 18 states have call successors, (18), 14 states have call predecessors, (18), 24 states have return successors, (35), 16 states have call predecessors, (35), 18 states have call successors, (35) [2023-12-18 19:29:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 394 transitions. [2023-12-18 19:29:04,935 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 394 transitions. Word has length 41 [2023-12-18 19:29:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:04,935 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 394 transitions. [2023-12-18 19:29:04,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 19:29:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 394 transitions. [2023-12-18 19:29:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 19:29:04,936 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:04,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:04,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 19:29:05,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:05,137 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:05,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash -732340759, now seen corresponding path program 5 times [2023-12-18 19:29:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:05,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45653216] [2023-12-18 19:29:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:05,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:05,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:29:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:05,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-18 19:29:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:05,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-12-18 19:29:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 19:29:05,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:05,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45653216] [2023-12-18 19:29:05,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45653216] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:05,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448312777] [2023-12-18 19:29:05,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 19:29:05,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:05,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:05,247 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:29:05,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 19:29:05,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-18 19:29:05,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:05,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 19:29:05,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 19:29:05,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-18 19:29:05,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448312777] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:05,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:05,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-12-18 19:29:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957427515] [2023-12-18 19:29:05,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:05,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-18 19:29:05,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-18 19:29:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-12-18 19:29:05,440 INFO L87 Difference]: Start difference. First operand 301 states and 394 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 19:29:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:05,615 INFO L93 Difference]: Finished difference Result 616 states and 860 transitions. [2023-12-18 19:29:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 19:29:05,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2023-12-18 19:29:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:05,617 INFO L225 Difference]: With dead ends: 616 [2023-12-18 19:29:05,617 INFO L226 Difference]: Without dead ends: 493 [2023-12-18 19:29:05,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-12-18 19:29:05,618 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:05,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 190 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:29:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-12-18 19:29:05,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 388. [2023-12-18 19:29:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 342 states have (on average 1.391812865497076) internal successors, (476), 353 states have internal predecessors, (476), 19 states have call successors, (19), 14 states have call predecessors, (19), 26 states have return successors, (49), 20 states have call predecessors, (49), 19 states have call successors, (49) [2023-12-18 19:29:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 544 transitions. [2023-12-18 19:29:05,653 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 544 transitions. Word has length 41 [2023-12-18 19:29:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:05,654 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 544 transitions. [2023-12-18 19:29:05,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-18 19:29:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 544 transitions. [2023-12-18 19:29:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 19:29:05,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:05,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:05,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 19:29:05,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-18 19:29:05,871 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:05,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash 878067518, now seen corresponding path program 1 times [2023-12-18 19:29:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:05,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828010531] [2023-12-18 19:29:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:05,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:06,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:29:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:06,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:29:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:06,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-12-18 19:29:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 19:29:06,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:06,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828010531] [2023-12-18 19:29:06,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828010531] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:06,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097132194] [2023-12-18 19:29:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:06,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:06,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:06,461 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:29:06,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 19:29:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:06,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-18 19:29:06,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:06,670 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 [2023-12-18 19:29:06,695 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 [2023-12-18 19:29:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-18 19:29:06,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:06,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-18 19:29:06,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-18 19:29:07,030 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 8 treesize of output 4 [2023-12-18 19:29:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 19:29:07,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097132194] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:07,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:07,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 14] total 43 [2023-12-18 19:29:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142516423] [2023-12-18 19:29:07,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:07,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-18 19:29:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-18 19:29:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2023-12-18 19:29:07,134 INFO L87 Difference]: Start difference. First operand 388 states and 544 transitions. Second operand has 43 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 6 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 19:29:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:08,861 INFO L93 Difference]: Finished difference Result 663 states and 917 transitions. [2023-12-18 19:29:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-18 19:29:08,861 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 6 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 41 [2023-12-18 19:29:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:08,864 INFO L225 Difference]: With dead ends: 663 [2023-12-18 19:29:08,864 INFO L226 Difference]: Without dead ends: 593 [2023-12-18 19:29:08,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1116, Invalid=7074, Unknown=0, NotChecked=0, Total=8190 [2023-12-18 19:29:08,865 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 185 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:08,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 360 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 19:29:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-12-18 19:29:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 342. [2023-12-18 19:29:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 305 states have (on average 1.4163934426229507) internal successors, (432), 312 states have internal predecessors, (432), 16 states have call successors, (16), 12 states have call predecessors, (16), 20 states have return successors, (40), 17 states have call predecessors, (40), 16 states have call successors, (40) [2023-12-18 19:29:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 488 transitions. [2023-12-18 19:29:08,909 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 488 transitions. Word has length 41 [2023-12-18 19:29:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:08,909 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 488 transitions. [2023-12-18 19:29:08,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 6 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 19:29:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 488 transitions. [2023-12-18 19:29:08,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-18 19:29:08,910 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:08,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:08,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-18 19:29:09,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 19:29:09,115 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:09,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:09,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1412786170, now seen corresponding path program 1 times [2023-12-18 19:29:09,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:09,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833573505] [2023-12-18 19:29:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:09,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:09,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:29:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:09,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-18 19:29:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:09,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-12-18 19:29:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 19:29:09,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833573505] [2023-12-18 19:29:09,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833573505] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599565516] [2023-12-18 19:29:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:09,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:09,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:09,299 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:29:09,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 19:29:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:09,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 19:29:09,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:09,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:29:09,461 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 26 treesize of output 11 [2023-12-18 19:29:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 19:29:09,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 19:29:09,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599565516] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:09,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:09,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 27 [2023-12-18 19:29:09,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809626450] [2023-12-18 19:29:09,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:09,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 19:29:09,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 19:29:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-12-18 19:29:09,733 INFO L87 Difference]: Start difference. First operand 342 states and 488 transitions. Second operand has 27 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-18 19:29:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:10,384 INFO L93 Difference]: Finished difference Result 715 states and 1006 transitions. [2023-12-18 19:29:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-18 19:29:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2023-12-18 19:29:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:10,403 INFO L225 Difference]: With dead ends: 715 [2023-12-18 19:29:10,403 INFO L226 Difference]: Without dead ends: 531 [2023-12-18 19:29:10,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=1686, Unknown=0, NotChecked=0, Total=2070 [2023-12-18 19:29:10,404 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:10,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 356 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:29:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-12-18 19:29:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 381. [2023-12-18 19:29:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 338 states have (on average 1.4201183431952662) internal successors, (480), 347 states have internal predecessors, (480), 18 states have call successors, (18), 14 states have call predecessors, (18), 24 states have return successors, (47), 19 states have call predecessors, (47), 18 states have call successors, (47) [2023-12-18 19:29:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 545 transitions. [2023-12-18 19:29:10,482 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 545 transitions. Word has length 42 [2023-12-18 19:29:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:10,483 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 545 transitions. [2023-12-18 19:29:10,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-18 19:29:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 545 transitions. [2023-12-18 19:29:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 19:29:10,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:10,496 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:10,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 19:29:10,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 19:29:10,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:10,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -211953815, now seen corresponding path program 2 times [2023-12-18 19:29:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:10,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112445390] [2023-12-18 19:29:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:10,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:11,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:29:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:11,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 19:29:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:11,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-18 19:29:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 19:29:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112445390] [2023-12-18 19:29:11,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112445390] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291537842] [2023-12-18 19:29:11,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:29:11,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:11,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:11,271 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:29:11,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 19:29:11,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:29:11,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:29:11,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-18 19:29:11,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:11,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:29:11,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:29:11,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 15 [2023-12-18 19:29:11,674 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 [2023-12-18 19:29:11,714 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 [2023-12-18 19:29:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 19:29:11,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:11,960 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 18 treesize of output 16 [2023-12-18 19:29:11,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-18 19:29:12,314 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 43 treesize of output 37 [2023-12-18 19:29:12,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:29:12,318 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 71 treesize of output 57 [2023-12-18 19:29:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 19:29:12,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291537842] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:12,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:12,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 17] total 50 [2023-12-18 19:29:12,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542417542] [2023-12-18 19:29:12,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:12,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-18 19:29:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-18 19:29:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 19:29:12,378 INFO L87 Difference]: Start difference. First operand 381 states and 545 transitions. Second operand has 50 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 45 states have internal predecessors, (102), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-18 19:29:16,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:29:20,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:29:24,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:29:28,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:29:33,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:29:37,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:29:40,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:29:44,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:29:46,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:29:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:46,975 INFO L93 Difference]: Finished difference Result 967 states and 1332 transitions. [2023-12-18 19:29:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-18 19:29:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 45 states have internal predecessors, (102), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) Word has length 43 [2023-12-18 19:29:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:46,978 INFO L225 Difference]: With dead ends: 967 [2023-12-18 19:29:46,978 INFO L226 Difference]: Without dead ends: 783 [2023-12-18 19:29:46,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3295 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1424, Invalid=9288, Unknown=0, NotChecked=0, Total=10712 [2023-12-18 19:29:46,980 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 355 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 112 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:46,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 359 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1466 Invalid, 10 Unknown, 0 Unchecked, 32.9s Time] [2023-12-18 19:29:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2023-12-18 19:29:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 494. [2023-12-18 19:29:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 438 states have (on average 1.4109589041095891) internal successors, (618), 451 states have internal predecessors, (618), 22 states have call successors, (22), 18 states have call predecessors, (22), 33 states have return successors, (61), 24 states have call predecessors, (61), 22 states have call successors, (61) [2023-12-18 19:29:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 701 transitions. [2023-12-18 19:29:47,031 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 701 transitions. Word has length 43 [2023-12-18 19:29:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:47,031 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 701 transitions. [2023-12-18 19:29:47,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 45 states have internal predecessors, (102), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-18 19:29:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 701 transitions. [2023-12-18 19:29:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 19:29:47,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:47,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:47,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-18 19:29:47,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 19:29:47,237 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:47,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1301143466, now seen corresponding path program 1 times [2023-12-18 19:29:47,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:47,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047175162] [2023-12-18 19:29:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:47,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:47,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:29:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:47,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 19:29:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:47,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-18 19:29:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-18 19:29:47,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047175162] [2023-12-18 19:29:47,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047175162] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121742905] [2023-12-18 19:29:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:47,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:47,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:47,448 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:29:47,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 19:29:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:47,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 19:29:47,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-18 19:29:47,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:29:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-18 19:29:47,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121742905] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:29:47,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:29:47,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2023-12-18 19:29:47,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678323726] [2023-12-18 19:29:47,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:29:47,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 19:29:47,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:29:47,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 19:29:47,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-18 19:29:47,706 INFO L87 Difference]: Start difference. First operand 494 states and 701 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-18 19:29:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:29:47,853 INFO L93 Difference]: Finished difference Result 1134 states and 1747 transitions. [2023-12-18 19:29:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 19:29:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2023-12-18 19:29:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:29:47,855 INFO L225 Difference]: With dead ends: 1134 [2023-12-18 19:29:47,856 INFO L226 Difference]: Without dead ends: 756 [2023-12-18 19:29:47,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-12-18 19:29:47,857 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:29:47,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 230 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 19:29:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2023-12-18 19:29:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 679. [2023-12-18 19:29:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 586 states have (on average 1.3566552901023892) internal successors, (795), 620 states have internal predecessors, (795), 36 states have call successors, (36), 18 states have call predecessors, (36), 56 states have return successors, (155), 40 states have call predecessors, (155), 36 states have call successors, (155) [2023-12-18 19:29:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 986 transitions. [2023-12-18 19:29:47,930 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 986 transitions. Word has length 44 [2023-12-18 19:29:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:29:47,931 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 986 transitions. [2023-12-18 19:29:47,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-18 19:29:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 986 transitions. [2023-12-18 19:29:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 19:29:47,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:29:47,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:29:47,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 19:29:48,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:48,137 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:29:48,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:29:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2110490092, now seen corresponding path program 1 times [2023-12-18 19:29:48,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:29:48,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200161578] [2023-12-18 19:29:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:48,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:29:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:48,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:29:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:48,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 19:29:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:48,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-18 19:29:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:29:48,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:29:48,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200161578] [2023-12-18 19:29:48,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200161578] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:29:48,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200516809] [2023-12-18 19:29:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:29:48,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:29:48,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:29:48,630 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:29:48,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 19:29:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:29:48,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-18 19:29:48,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:29:48,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:29:48,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:29:48,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2023-12-18 19:29:48,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:29:48,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2023-12-18 19:29:48,997 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-12-18 19:29:48,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 29 [2023-12-18 19:29:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 19:29:49,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 19:30:01,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200516809] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:01,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:01,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 36 [2023-12-18 19:30:01,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417975961] [2023-12-18 19:30:01,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:01,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-18 19:30:01,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-18 19:30:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1097, Unknown=2, NotChecked=0, Total=1260 [2023-12-18 19:30:01,559 INFO L87 Difference]: Start difference. First operand 679 states and 986 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 19:30:05,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:09,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:13,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:17,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:21,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:25,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:29,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:33,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:34,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:38,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:42,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 19:30:42,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:42,950 INFO L93 Difference]: Finished difference Result 913 states and 1307 transitions. [2023-12-18 19:30:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 19:30:42,951 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) Word has length 44 [2023-12-18 19:30:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:42,966 INFO L225 Difference]: With dead ends: 913 [2023-12-18 19:30:42,967 INFO L226 Difference]: Without dead ends: 871 [2023-12-18 19:30:42,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=303, Invalid=1951, Unknown=2, NotChecked=0, Total=2256 [2023-12-18 19:30:42,967 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 144 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 50 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.1s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:42,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 327 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 897 Invalid, 11 Unknown, 0 Unchecked, 41.1s Time] [2023-12-18 19:30:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2023-12-18 19:30:43,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 681. [2023-12-18 19:30:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 589 states have (on average 1.3599320882852293) internal successors, (801), 623 states have internal predecessors, (801), 35 states have call successors, (35), 18 states have call predecessors, (35), 56 states have return successors, (154), 39 states have call predecessors, (154), 35 states have call successors, (154) [2023-12-18 19:30:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 990 transitions. [2023-12-18 19:30:43,064 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 990 transitions. Word has length 44 [2023-12-18 19:30:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:43,064 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 990 transitions. [2023-12-18 19:30:43,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 19:30:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 990 transitions. [2023-12-18 19:30:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 19:30:43,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:43,066 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:43,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 19:30:43,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-18 19:30:43,280 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:43,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:43,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1373530024, now seen corresponding path program 2 times [2023-12-18 19:30:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:43,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109562868] [2023-12-18 19:30:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:43,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:30:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:43,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 19:30:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:43,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-18 19:30:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 19:30:43,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:43,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109562868] [2023-12-18 19:30:43,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109562868] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:43,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301017471] [2023-12-18 19:30:43,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 19:30:43,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:43,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:43,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:30:43,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 19:30:43,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 19:30:43,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:43,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 19:30:43,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:43,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-18 19:30:43,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:30:43,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-12-18 19:30:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-18 19:30:44,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 19:30:44,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301017471] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:44,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:44,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 9] total 27 [2023-12-18 19:30:44,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373506884] [2023-12-18 19:30:44,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:44,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 19:30:44,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:44,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 19:30:44,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-12-18 19:30:44,192 INFO L87 Difference]: Start difference. First operand 681 states and 990 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-18 19:30:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:44,684 INFO L93 Difference]: Finished difference Result 985 states and 1415 transitions. [2023-12-18 19:30:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 19:30:44,684 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) Word has length 44 [2023-12-18 19:30:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:44,688 INFO L225 Difference]: With dead ends: 985 [2023-12-18 19:30:44,688 INFO L226 Difference]: Without dead ends: 745 [2023-12-18 19:30:44,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2023-12-18 19:30:44,690 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 107 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:44,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 220 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:30:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-12-18 19:30:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 629. [2023-12-18 19:30:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 544 states have (on average 1.3621323529411764) internal successors, (741), 574 states have internal predecessors, (741), 34 states have call successors, (34), 17 states have call predecessors, (34), 50 states have return successors, (142), 37 states have call predecessors, (142), 34 states have call successors, (142) [2023-12-18 19:30:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 917 transitions. [2023-12-18 19:30:44,780 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 917 transitions. Word has length 44 [2023-12-18 19:30:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:44,780 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 917 transitions. [2023-12-18 19:30:44,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-18 19:30:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 917 transitions. [2023-12-18 19:30:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 19:30:44,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:44,782 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:44,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 19:30:44,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 19:30:44,991 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:44,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:44,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1154675306, now seen corresponding path program 3 times [2023-12-18 19:30:44,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:44,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576374195] [2023-12-18 19:30:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:44,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:45,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-18 19:30:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:45,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-18 19:30:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:45,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-12-18 19:30:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 19:30:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:30:45,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 19:30:45,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576374195] [2023-12-18 19:30:45,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576374195] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 19:30:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141075504] [2023-12-18 19:30:45,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 19:30:45,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:45,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 19:30:45,493 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 19:30:45,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 19:30:45,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 19:30:45,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 19:30:45,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-18 19:30:45,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 19:30:45,656 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 8 treesize of output 1 [2023-12-18 19:30:45,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:30:45,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-12-18 19:30:45,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:30:45,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2023-12-18 19:30:45,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:30:45,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-12-18 19:30:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 19:30:46,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 19:30:46,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 19:30:46,508 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 58 treesize of output 40 [2023-12-18 19:30:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-18 19:30:46,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141075504] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 19:30:46,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 19:30:46,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 16] total 44 [2023-12-18 19:30:46,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335391856] [2023-12-18 19:30:46,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 19:30:46,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-18 19:30:46,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 19:30:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-18 19:30:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 19:30:46,547 INFO L87 Difference]: Start difference. First operand 629 states and 917 transitions. Second operand has 44 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 19:30:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 19:30:47,237 INFO L93 Difference]: Finished difference Result 765 states and 1097 transitions. [2023-12-18 19:30:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 19:30:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) Word has length 44 [2023-12-18 19:30:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 19:30:47,240 INFO L225 Difference]: With dead ends: 765 [2023-12-18 19:30:47,240 INFO L226 Difference]: Without dead ends: 757 [2023-12-18 19:30:47,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=489, Invalid=2933, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 19:30:47,241 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 135 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 19:30:47,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 297 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 19:30:47,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2023-12-18 19:30:47,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 629. [2023-12-18 19:30:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 544 states have (on average 1.3602941176470589) internal successors, (740), 574 states have internal predecessors, (740), 34 states have call successors, (34), 17 states have call predecessors, (34), 50 states have return successors, (142), 37 states have call predecessors, (142), 34 states have call successors, (142) [2023-12-18 19:30:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 916 transitions. [2023-12-18 19:30:47,328 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 916 transitions. Word has length 44 [2023-12-18 19:30:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 19:30:47,328 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 916 transitions. [2023-12-18 19:30:47,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-18 19:30:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 916 transitions. [2023-12-18 19:30:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-18 19:30:47,330 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 19:30:47,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:47,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-18 19:30:47,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 19:30:47,535 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 19:30:47,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 19:30:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1964021932, now seen corresponding path program 1 times [2023-12-18 19:30:47,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 19:30:47,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935302353] [2023-12-18 19:30:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 19:30:47,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 19:30:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-18 19:30:47,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-18 19:30:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-18 19:30:47,588 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-18 19:30:47,588 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-18 19:30:47,589 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 19:30:47,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-18 19:30:47,593 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 19:30:47,595 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 19:30:47,613 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-12-18 19:30:47,616 WARN L1574 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-12-18 19:30:47,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:30:47 BoogieIcfgContainer [2023-12-18 19:30:47,625 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 19:30:47,625 INFO L158 Benchmark]: Toolchain (without parser) took 255279.94ms. Allocated memory was 289.4MB in the beginning and 563.1MB in the end (delta: 273.7MB). Free memory was 239.2MB in the beginning and 503.1MB in the end (delta: -263.8MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. [2023-12-18 19:30:47,625 INFO L158 Benchmark]: CDTParser took 0.53ms. Allocated memory is still 203.4MB. Free memory is still 154.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 19:30:47,625 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.61ms. Allocated memory is still 289.4MB. Free memory was 239.2MB in the beginning and 227.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 19:30:47,625 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.72ms. Allocated memory is still 289.4MB. Free memory was 227.7MB in the beginning and 226.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 19:30:47,625 INFO L158 Benchmark]: Boogie Preprocessor took 26.32ms. Allocated memory is still 289.4MB. Free memory was 226.1MB in the beginning and 224.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 19:30:47,626 INFO L158 Benchmark]: RCFGBuilder took 292.24ms. Allocated memory is still 289.4MB. Free memory was 224.0MB in the beginning and 208.8MB in the end (delta: 15.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-18 19:30:47,626 INFO L158 Benchmark]: TraceAbstraction took 254752.10ms. Allocated memory was 289.4MB in the beginning and 563.1MB in the end (delta: 273.7MB). Free memory was 207.8MB in the beginning and 503.1MB in the end (delta: -295.3MB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 19:30:47,626 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53ms. Allocated memory is still 203.4MB. Free memory is still 154.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.61ms. Allocated memory is still 289.4MB. Free memory was 239.2MB in the beginning and 227.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.72ms. Allocated memory is still 289.4MB. Free memory was 227.7MB in the beginning and 226.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.32ms. Allocated memory is still 289.4MB. Free memory was 226.1MB in the beginning and 224.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 292.24ms. Allocated memory is still 289.4MB. Free memory was 224.0MB in the beginning and 208.8MB in the end (delta: 15.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 254752.10ms. Allocated memory was 289.4MB in the beginning and 563.1MB in the end (delta: 273.7MB). Free memory was 207.8MB in the beginning and 503.1MB in the end (delta: -295.3MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 25. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [N=2, i=0, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2, i=1, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2, i=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [N=2, i=2, x={9:0}] [L45] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2, i=1, res=10, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [N=2, i=1, res=10, x={9:0}, x={9:0}] [L25] EXPR res ^ x[i] VAL [N=2, i=1, res=10, x={9:0}, x={9:0}] [L25] res = res ^ x[i] [L24] i++ VAL [N=2, i=2, res=-2147483638, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [N=2, i=2, res=-2147483638, x={9:0}, x={9:0}] [L27] return res; [L45] RET, EXPR xor(x) VAL [N=2, x={9:0}] [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [N=2] [L48] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2, i=1, res=-2147483648, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [N=2, i=1, res=-2147483648, x={9:0}, x={9:0}] [L25] EXPR res ^ x[i] VAL [N=2, i=1, res=-2147483648, x={9:0}, x={9:0}] [L25] res = res ^ x[i] [L24] i++ VAL [N=2, i=2, res=-2147483649, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [N=2, i=2, res=-2147483649, x={9:0}, x={9:0}] [L27] return res; [L48] RET, EXPR xor(x) VAL [N=2, ret=-2147483638, temp=10, x={9:0}] [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [N=2, i=0, ret2=2147483647, ret=-2147483638, temp=-2147483648, x={9:0}] [L50] COND TRUE i