/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-patterns/array12_pattern.c


--------------------------------------------------------------------------------


This is Ultimate 0.2.2-dev-05d3305-m
[2022-10-15 16:24:23,056 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-10-15 16:24:23,060 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2022-10-15 16:24:23,184 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-10-15 16:24:23,186 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-10-15 16:24:23,188 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-10-15 16:24:23,192 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-10-15 16:24:23,201 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2022-10-15 16:24:23,207 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
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[2022-10-15 16:24:23,229 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2022-10-15 16:24:23,236 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
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[2022-10-15 16:24:23,238 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2022-10-15 16:24:23,240 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-10-15 16:24:23,241 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf
[2022-10-15 16:24:23,299 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-10-15 16:24:23,300 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-10-15 16:24:23,300 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-10-15 16:24:23,301 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-10-15 16:24:23,303 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-10-15 16:24:23,303 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-10-15 16:24:23,306 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-10-15 16:24:23,306 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-10-15 16:24:23,307 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-10-15 16:24:23,307 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-10-15 16:24:23,308 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-10-15 16:24:23,308 INFO  L138        SettingsManager]:  * Check unreachability of error function in SV-COMP mode=false
[2022-10-15 16:24:23,309 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-10-15 16:24:23,309 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-10-15 16:24:23,309 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-10-15 16:24:23,309 INFO  L138        SettingsManager]:  * Check for the main procedure if all allocated memory was freed=true
[2022-10-15 16:24:23,309 INFO  L138        SettingsManager]:  * Bitprecise bitfields=true
[2022-10-15 16:24:23,310 INFO  L138        SettingsManager]:  * SV-COMP memtrack compatibility mode=true
[2022-10-15 16:24:23,310 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-10-15 16:24:23,310 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2022-10-15 16:24:23,310 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-10-15 16:24:23,310 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-10-15 16:24:23,311 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-10-15 16:24:23,311 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-10-15 16:24:23,311 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-10-15 16:24:23,311 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-10-15 16:24:23,311 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-10-15 16:24:23,312 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-10-15 16:24:23,312 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-10-15 16:24:23,312 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-10-15 16:24:23,312 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2022-10-15 16:24:23,780 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-10-15 16:24:23,815 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-10-15 16:24:23,818 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-10-15 16:24:23,820 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-10-15 16:24:23,821 INFO  L275        PluginConnector]: CDTParser initialized
[2022-10-15 16:24:23,822 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array12_pattern.c
[2022-10-15 16:24:23,922 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8d9a3185/c54a06c15e9b41a3bb369e0a1b82c7bf/FLAGc0667a6ed
[2022-10-15 16:24:24,597 INFO  L306              CDTParser]: Found 1 translation units.
[2022-10-15 16:24:24,598 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array12_pattern.c
[2022-10-15 16:24:24,606 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8d9a3185/c54a06c15e9b41a3bb369e0a1b82c7bf/FLAGc0667a6ed
[2022-10-15 16:24:24,961 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8d9a3185/c54a06c15e9b41a3bb369e0a1b82c7bf
[2022-10-15 16:24:24,964 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-10-15 16:24:24,973 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2022-10-15 16:24:24,978 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-10-15 16:24:24,979 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-10-15 16:24:24,984 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-10-15 16:24:24,987 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:24:24" (1/1) ...
[2022-10-15 16:24:24,990 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@443706aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:24, skipping insertion in model container
[2022-10-15 16:24:24,990 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:24:24" (1/1) ...
[2022-10-15 16:24:25,000 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-10-15 16:24:25,025 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-10-15 16:24:25,291 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362]
[2022-10-15 16:24:25,350 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-10-15 16:24:25,368 INFO  L203         MainTranslator]: Completed pre-run
[2022-10-15 16:24:25,392 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362]
[2022-10-15 16:24:25,436 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-10-15 16:24:25,461 INFO  L208         MainTranslator]: Completed translation
[2022-10-15 16:24:25,461 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25 WrapperNode
[2022-10-15 16:24:25,463 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-10-15 16:24:25,465 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-10-15 16:24:25,465 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-10-15 16:24:25,466 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-10-15 16:24:25,475 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,497 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,541 INFO  L138                Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90
[2022-10-15 16:24:25,542 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-10-15 16:24:25,543 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-10-15 16:24:25,544 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-10-15 16:24:25,544 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-10-15 16:24:25,556 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,556 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,565 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,566 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,578 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,586 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,589 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,596 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,602 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-10-15 16:24:25,603 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-10-15 16:24:25,603 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-10-15 16:24:25,603 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-10-15 16:24:25,605 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (1/1) ...
[2022-10-15 16:24:25,616 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-10-15 16:24:25,631 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:24:25,649 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-10-15 16:24:25,667 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-10-15 16:24:25,714 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-10-15 16:24:25,714 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-10-15 16:24:25,715 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-10-15 16:24:25,715 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-10-15 16:24:25,715 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-10-15 16:24:25,715 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2022-10-15 16:24:25,715 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-10-15 16:24:25,715 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-10-15 16:24:25,716 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2022-10-15 16:24:25,716 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-10-15 16:24:25,792 INFO  L235             CfgBuilder]: Building ICFG
[2022-10-15 16:24:25,794 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-10-15 16:24:26,106 INFO  L276             CfgBuilder]: Performing block encoding
[2022-10-15 16:24:26,115 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-10-15 16:24:26,115 INFO  L300             CfgBuilder]: Removed 5 assume(true) statements.
[2022-10-15 16:24:26,118 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:24:26 BoogieIcfgContainer
[2022-10-15 16:24:26,119 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-10-15 16:24:26,122 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-10-15 16:24:26,122 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-10-15 16:24:26,126 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-10-15 16:24:26,127 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:24:24" (1/3) ...
[2022-10-15 16:24:26,128 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d88a838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:24:26, skipping insertion in model container
[2022-10-15 16:24:26,128 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:24:25" (2/3) ...
[2022-10-15 16:24:26,129 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d88a838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:24:26, skipping insertion in model container
[2022-10-15 16:24:26,129 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:24:26" (3/3) ...
[2022-10-15 16:24:26,131 INFO  L112   eAbstractionObserver]: Analyzing ICFG array12_pattern.c
[2022-10-15 16:24:26,160 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-10-15 16:24:26,160 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations.
[2022-10-15 16:24:26,276 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-10-15 16:24:26,286 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@bc267ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-10-15 16:24:26,287 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 10 error locations.
[2022-10-15 16:24:26,293 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 44 states, 29 states have (on average 1.793103448275862) internal successors, (52), 39 states have internal predecessors, (52), 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)
[2022-10-15 16:24:26,304 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-10-15 16:24:26,304 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:24:26,305 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:24:26,306 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:24:26,313 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:24:26,314 INFO  L85        PathProgramCache]: Analyzing trace with hash -1363174021, now seen corresponding path program 1 times
[2022-10-15 16:24:26,326 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:24:26,327 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816100212]
[2022-10-15 16:24:26,327 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:26,328 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:24:26,477 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-15 16:24:26,509 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:24:26,509 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816100212]
[2022-10-15 16:24:26,510 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic
[2022-10-15 16:24:26,511 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562502336]
[2022-10-15 16:24:26,511 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:26,511 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:26,512 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:24:26,516 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)
[2022-10-15 16:24:26,538 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-10-15 16:24:26,592 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-15 16:24:26,595 INFO  L263         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-10-15 16:24:26,601 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:24:26,631 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-15 16:24:26,632 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-10-15 16:24:26,633 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [562502336] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-15 16:24:26,633 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-15 16:24:26,633 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-15 16:24:26,636 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922417541]
[2022-10-15 16:24:26,637 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-15 16:24:26,644 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-10-15 16:24:26,644 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:24:26,682 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-10-15 16:24:26,683 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-10-15 16:24:26,687 INFO  L87              Difference]: Start difference. First operand  has 44 states, 29 states have (on average 1.793103448275862) internal successors, (52), 39 states have internal predecessors, (52), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:26,711 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:24:26,712 INFO  L93              Difference]: Finished difference Result 44 states and 50 transitions.
[2022-10-15 16:24:26,713 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-10-15 16:24:26,715 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2022-10-15 16:24:26,716 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:24:26,725 INFO  L225             Difference]: With dead ends: 44
[2022-10-15 16:24:26,725 INFO  L226             Difference]: Without dead ends: 42
[2022-10-15 16:24:26,727 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-10-15 16:24:26,733 INFO  L413           NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-10-15 16:24:26,735 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-10-15 16:24:26,759 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2022-10-15 16:24:26,781 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42.
[2022-10-15 16:24:26,783 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 42 states, 28 states have (on average 1.5) internal successors, (42), 37 states have internal predecessors, (42), 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)
[2022-10-15 16:24:26,785 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions.
[2022-10-15 16:24:26,787 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 11
[2022-10-15 16:24:26,787 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:24:26,788 INFO  L495      AbstractCegarLoop]: Abstraction has 42 states and 48 transitions.
[2022-10-15 16:24:26,788 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:26,788 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions.
[2022-10-15 16:24:26,790 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-10-15 16:24:26,790 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:24:26,790 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:24:26,834 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-10-15 16:24:27,005 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2022-10-15 16:24:27,007 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:24:27,009 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:24:27,009 INFO  L85        PathProgramCache]: Analyzing trace with hash 411833341, now seen corresponding path program 1 times
[2022-10-15 16:24:27,010 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:24:27,010 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296219078]
[2022-10-15 16:24:27,010 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:27,010 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:24:27,037 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:24:27,039 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255124448]
[2022-10-15 16:24:27,039 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:27,040 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:27,040 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:24:27,041 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)
[2022-10-15 16:24:27,056 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-10-15 16:24:27,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-15 16:24:27,103 INFO  L263         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core
[2022-10-15 16:24:27,105 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:24:27,169 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-10-15 16:24:27,188 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-15 16:24:27,188 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-10-15 16:24:27,188 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:24:27,189 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296219078]
[2022-10-15 16:24:27,189 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:24:27,189 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255124448]
[2022-10-15 16:24:27,190 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255124448] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-15 16:24:27,190 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-15 16:24:27,190 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-15 16:24:27,190 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714117567]
[2022-10-15 16:24:27,191 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-15 16:24:27,192 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-10-15 16:24:27,192 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:24:27,193 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-10-15 16:24:27,193 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-15 16:24:27,194 INFO  L87              Difference]: Start difference. First operand 42 states and 48 transitions. Second operand  has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:27,243 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:24:27,244 INFO  L93              Difference]: Finished difference Result 38 states and 44 transitions.
[2022-10-15 16:24:27,244 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2022-10-15 16:24:27,244 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2022-10-15 16:24:27,245 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:24:27,246 INFO  L225             Difference]: With dead ends: 38
[2022-10-15 16:24:27,246 INFO  L226             Difference]: Without dead ends: 38
[2022-10-15 16:24:27,247 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-10-15 16:24:27,249 INFO  L413           NwaCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-10-15 16:24:27,250 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-10-15 16:24:27,251 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2022-10-15 16:24:27,259 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38.
[2022-10-15 16:24:27,259 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 38 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 33 states have internal predecessors, (38), 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)
[2022-10-15 16:24:27,263 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions.
[2022-10-15 16:24:27,263 INFO  L78                 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 11
[2022-10-15 16:24:27,267 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:24:27,267 INFO  L495      AbstractCegarLoop]: Abstraction has 38 states and 44 transitions.
[2022-10-15 16:24:27,267 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:27,268 INFO  L276                IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions.
[2022-10-15 16:24:27,268 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2022-10-15 16:24:27,269 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:24:27,269 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:24:27,311 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-10-15 16:24:27,485 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2022-10-15 16:24:27,487 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:24:27,488 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:24:27,489 INFO  L85        PathProgramCache]: Analyzing trace with hash 411833342, now seen corresponding path program 1 times
[2022-10-15 16:24:27,489 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:24:27,489 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486607674]
[2022-10-15 16:24:27,489 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:27,490 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:24:27,507 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:24:27,508 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441099261]
[2022-10-15 16:24:27,508 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:27,508 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:27,509 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:24:27,510 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)
[2022-10-15 16:24:27,533 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-10-15 16:24:27,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-15 16:24:27,576 INFO  L263         TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-10-15 16:24:27,580 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:24:27,688 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-10-15 16:24:27,902 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-15 16:24:27,903 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-10-15 16:24:27,903 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:24:27,903 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486607674]
[2022-10-15 16:24:27,904 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:24:27,904 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441099261]
[2022-10-15 16:24:27,904 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [441099261] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-15 16:24:27,904 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-15 16:24:27,905 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-10-15 16:24:27,905 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888342045]
[2022-10-15 16:24:27,905 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-15 16:24:27,906 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-10-15 16:24:27,906 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:24:27,907 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-10-15 16:24:27,907 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2022-10-15 16:24:27,908 INFO  L87              Difference]: Start difference. First operand 38 states and 44 transitions. Second operand  has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:28,321 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:24:28,321 INFO  L93              Difference]: Finished difference Result 73 states and 86 transitions.
[2022-10-15 16:24:28,322 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-10-15 16:24:28,322 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2022-10-15 16:24:28,323 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:24:28,328 INFO  L225             Difference]: With dead ends: 73
[2022-10-15 16:24:28,329 INFO  L226             Difference]: Without dead ends: 73
[2022-10-15 16:24:28,329 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2022-10-15 16:24:28,336 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-10-15 16:24:28,341 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 44 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-10-15 16:24:28,342 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2022-10-15 16:24:28,360 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52.
[2022-10-15 16:24:28,361 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 52 states, 40 states have (on average 1.375) internal successors, (55), 45 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-10-15 16:24:28,363 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions.
[2022-10-15 16:24:28,363 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 11
[2022-10-15 16:24:28,364 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:24:28,364 INFO  L495      AbstractCegarLoop]: Abstraction has 52 states and 65 transitions.
[2022-10-15 16:24:28,364 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:28,365 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions.
[2022-10-15 16:24:28,365 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2022-10-15 16:24:28,365 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:24:28,365 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:24:28,390 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-10-15 16:24:28,566 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:28,567 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:24:28,569 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:24:28,569 INFO  L85        PathProgramCache]: Analyzing trace with hash -1794508064, now seen corresponding path program 1 times
[2022-10-15 16:24:28,570 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:24:28,570 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529358361]
[2022-10-15 16:24:28,571 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:28,571 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:24:28,611 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:24:28,611 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292777379]
[2022-10-15 16:24:28,611 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:28,612 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:28,612 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:24:28,622 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)
[2022-10-15 16:24:28,625 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-10-15 16:24:28,695 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-15 16:24:28,697 INFO  L263         TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core
[2022-10-15 16:24:28,704 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:24:28,823 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-10-15 16:24:29,903 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-15 16:24:29,904 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-10-15 16:24:45,111 WARN  L233               SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-10-15 16:24:45,224 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-15 16:24:45,225 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:24:45,225 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529358361]
[2022-10-15 16:24:45,225 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:24:45,225 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292777379]
[2022-10-15 16:24:45,225 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292777379] provided 0 perfect and 2 imperfect interpolant sequences
[2022-10-15 16:24:45,226 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-10-15 16:24:45,226 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13
[2022-10-15 16:24:45,226 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618894120]
[2022-10-15 16:24:45,226 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-10-15 16:24:45,227 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2022-10-15 16:24:45,227 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:24:45,228 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2022-10-15 16:24:45,228 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182
[2022-10-15 16:24:45,228 INFO  L87              Difference]: Start difference. First operand 52 states and 65 transitions. Second operand  has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-10-15 16:24:51,233 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:24:51,233 INFO  L93              Difference]: Finished difference Result 140 states and 175 transitions.
[2022-10-15 16:24:51,234 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2022-10-15 16:24:51,234 INFO  L78                 Accepts]: Start accepts. Automaton has  has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14
[2022-10-15 16:24:51,235 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:24:51,237 INFO  L225             Difference]: With dead ends: 140
[2022-10-15 16:24:51,237 INFO  L226             Difference]: Without dead ends: 140
[2022-10-15 16:24:51,238 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702
[2022-10-15 16:24:51,239 INFO  L413           NwaCegarLoop]: 32 mSDtfsCounter, 259 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time
[2022-10-15 16:24:51,240 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 142 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time]
[2022-10-15 16:24:51,241 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 140 states.
[2022-10-15 16:24:51,250 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 72.
[2022-10-15 16:24:51,251 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 72 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 65 states have internal predecessors, (85), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-10-15 16:24:51,252 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions.
[2022-10-15 16:24:51,252 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 14
[2022-10-15 16:24:51,253 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:24:51,253 INFO  L495      AbstractCegarLoop]: Abstraction has 72 states and 95 transitions.
[2022-10-15 16:24:51,253 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-10-15 16:24:51,253 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions.
[2022-10-15 16:24:51,254 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2022-10-15 16:24:51,254 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:24:51,255 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:24:51,277 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2022-10-15 16:24:51,456 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:51,457 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:24:51,458 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:24:51,458 INFO  L85        PathProgramCache]: Analyzing trace with hash -733457433, now seen corresponding path program 1 times
[2022-10-15 16:24:51,460 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:24:51,461 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613158628]
[2022-10-15 16:24:51,461 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:51,461 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:24:51,476 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:24:51,476 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572782259]
[2022-10-15 16:24:51,476 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:51,477 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:51,477 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:24:51,478 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)
[2022-10-15 16:24:51,497 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-10-15 16:24:51,538 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-15 16:24:51,539 INFO  L263         TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-10-15 16:24:51,541 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:24:51,595 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-15 16:24:51,595 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-10-15 16:24:51,641 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-10-15 16:24:51,642 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:24:51,642 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613158628]
[2022-10-15 16:24:51,642 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:24:51,642 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572782259]
[2022-10-15 16:24:51,643 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [572782259] provided 0 perfect and 2 imperfect interpolant sequences
[2022-10-15 16:24:51,643 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-10-15 16:24:51,643 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11
[2022-10-15 16:24:51,643 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77972153]
[2022-10-15 16:24:51,643 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-10-15 16:24:51,644 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-10-15 16:24:51,644 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:24:51,645 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-10-15 16:24:51,645 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2022-10-15 16:24:51,645 INFO  L87              Difference]: Start difference. First operand 72 states and 95 transitions. Second operand  has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:51,972 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:24:51,972 INFO  L93              Difference]: Finished difference Result 179 states and 211 transitions.
[2022-10-15 16:24:51,973 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2022-10-15 16:24:51,973 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17
[2022-10-15 16:24:51,973 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:24:51,975 INFO  L225             Difference]: With dead ends: 179
[2022-10-15 16:24:51,975 INFO  L226             Difference]: Without dead ends: 179
[2022-10-15 16:24:51,976 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342
[2022-10-15 16:24:51,977 INFO  L413           NwaCegarLoop]: 58 mSDtfsCounter, 267 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-10-15 16:24:51,977 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 151 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-10-15 16:24:51,978 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 179 states.
[2022-10-15 16:24:51,990 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 105.
[2022-10-15 16:24:51,990 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 105 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 96 states have internal predecessors, (130), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-10-15 16:24:51,992 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions.
[2022-10-15 16:24:51,992 INFO  L78                 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 17
[2022-10-15 16:24:51,992 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:24:51,992 INFO  L495      AbstractCegarLoop]: Abstraction has 105 states and 144 transitions.
[2022-10-15 16:24:51,993 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:51,993 INFO  L276                IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions.
[2022-10-15 16:24:51,994 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2022-10-15 16:24:51,994 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:24:51,994 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:24:52,034 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-10-15 16:24:52,208 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:52,209 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:24:52,210 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:24:52,210 INFO  L85        PathProgramCache]: Analyzing trace with hash 1959390970, now seen corresponding path program 1 times
[2022-10-15 16:24:52,210 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:24:52,211 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208560773]
[2022-10-15 16:24:52,211 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:52,211 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:24:52,229 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:24:52,233 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731076277]
[2022-10-15 16:24:52,233 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:52,233 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:52,234 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:24:52,234 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)
[2022-10-15 16:24:52,253 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-10-15 16:24:52,280 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-15 16:24:52,281 INFO  L263         TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-10-15 16:24:52,283 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:24:52,319 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-10-15 16:24:52,319 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-10-15 16:24:52,319 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:24:52,319 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208560773]
[2022-10-15 16:24:52,320 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:24:52,320 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731076277]
[2022-10-15 16:24:52,320 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [731076277] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-15 16:24:52,320 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-15 16:24:52,320 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2022-10-15 16:24:52,321 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769140517]
[2022-10-15 16:24:52,321 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-15 16:24:52,321 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-10-15 16:24:52,322 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:24:52,322 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-10-15 16:24:52,322 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2022-10-15 16:24:52,323 INFO  L87              Difference]: Start difference. First operand 105 states and 144 transitions. Second operand  has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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)
[2022-10-15 16:24:52,434 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:24:52,434 INFO  L93              Difference]: Finished difference Result 97 states and 125 transitions.
[2022-10-15 16:24:52,435 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2022-10-15 16:24:52,435 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 21
[2022-10-15 16:24:52,436 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:24:52,436 INFO  L225             Difference]: With dead ends: 97
[2022-10-15 16:24:52,437 INFO  L226             Difference]: Without dead ends: 97
[2022-10-15 16:24:52,437 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2022-10-15 16:24:52,438 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-10-15 16:24:52,439 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 69 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-10-15 16:24:52,440 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2022-10-15 16:24:52,446 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84.
[2022-10-15 16:24:52,447 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 84 states, 71 states have (on average 1.380281690140845) internal successors, (98), 76 states have internal predecessors, (98), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-10-15 16:24:52,448 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions.
[2022-10-15 16:24:52,448 INFO  L78                 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 21
[2022-10-15 16:24:52,449 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:24:52,449 INFO  L495      AbstractCegarLoop]: Abstraction has 84 states and 108 transitions.
[2022-10-15 16:24:52,449 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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)
[2022-10-15 16:24:52,449 INFO  L276                IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions.
[2022-10-15 16:24:52,450 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2022-10-15 16:24:52,450 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:24:52,450 INFO  L195           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:24:52,482 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2022-10-15 16:24:52,665 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:52,666 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:24:52,667 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:24:52,667 INFO  L85        PathProgramCache]: Analyzing trace with hash -880670391, now seen corresponding path program 2 times
[2022-10-15 16:24:52,668 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:24:52,668 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605896199]
[2022-10-15 16:24:52,668 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:52,668 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:24:52,680 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:24:52,680 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546317547]
[2022-10-15 16:24:52,680 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-10-15 16:24:52,681 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:52,681 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:24:52,682 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)
[2022-10-15 16:24:52,684 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-10-15 16:24:52,732 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-10-15 16:24:52,733 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-10-15 16:24:52,734 INFO  L263         TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core
[2022-10-15 16:24:52,739 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:24:52,772 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-10-15 16:24:53,602 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2022-10-15 16:24:53,603 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-10-15 16:24:53,603 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:24:53,603 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605896199]
[2022-10-15 16:24:53,603 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:24:53,603 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546317547]
[2022-10-15 16:24:53,603 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546317547] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-15 16:24:53,603 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-15 16:24:53,604 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-10-15 16:24:53,604 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843030136]
[2022-10-15 16:24:53,604 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-15 16:24:53,604 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2022-10-15 16:24:53,604 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:24:53,605 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2022-10-15 16:24:53,605 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2022-10-15 16:24:53,605 INFO  L87              Difference]: Start difference. First operand 84 states and 108 transitions. Second operand  has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:53,852 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:24:53,852 INFO  L93              Difference]: Finished difference Result 97 states and 119 transitions.
[2022-10-15 16:24:53,852 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-10-15 16:24:53,853 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20
[2022-10-15 16:24:53,853 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:24:53,853 INFO  L225             Difference]: With dead ends: 97
[2022-10-15 16:24:53,853 INFO  L226             Difference]: Without dead ends: 97
[2022-10-15 16:24:53,854 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2022-10-15 16:24:53,855 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-10-15 16:24:53,855 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 42 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-10-15 16:24:53,856 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2022-10-15 16:24:53,861 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86.
[2022-10-15 16:24:53,862 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 86 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 78 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2022-10-15 16:24:53,863 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions.
[2022-10-15 16:24:53,863 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 20
[2022-10-15 16:24:53,863 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:24:53,864 INFO  L495      AbstractCegarLoop]: Abstraction has 86 states and 106 transitions.
[2022-10-15 16:24:53,864 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2022-10-15 16:24:53,864 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions.
[2022-10-15 16:24:53,865 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2022-10-15 16:24:53,865 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:24:53,865 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]
[2022-10-15 16:24:53,904 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-10-15 16:24:54,079 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:54,080 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:24:54,081 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:24:54,081 INFO  L85        PathProgramCache]: Analyzing trace with hash -2119557213, now seen corresponding path program 1 times
[2022-10-15 16:24:54,081 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:24:54,082 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144752196]
[2022-10-15 16:24:54,082 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:54,082 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:24:54,104 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:24:54,104 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752845764]
[2022-10-15 16:24:54,104 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:24:54,105 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:24:54,107 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:24:54,108 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)
[2022-10-15 16:24:54,126 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-10-15 16:24:54,167 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-15 16:24:54,168 INFO  L263         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core
[2022-10-15 16:24:54,172 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:24:54,677 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-10-15 16:24:54,677 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-10-15 16:25:03,727 WARN  L233               SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-10-15 16:25:03,732 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:25:03,732 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144752196]
[2022-10-15 16:25:03,732 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:25:03,733 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752845764]
[2022-10-15 16:25:03,733 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752845764] provided 0 perfect and 1 imperfect interpolant sequences
[2022-10-15 16:25:03,733 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-10-15 16:25:03,733 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2022-10-15 16:25:03,734 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527703496]
[2022-10-15 16:25:03,734 INFO  L85    oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2022-10-15 16:25:03,734 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2022-10-15 16:25:03,734 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:25:03,735 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2022-10-15 16:25:03,735 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306
[2022-10-15 16:25:03,736 INFO  L87              Difference]: Start difference. First operand 86 states and 106 transitions. Second operand  has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-10-15 16:25:04,239 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:25:04,239 INFO  L93              Difference]: Finished difference Result 127 states and 152 transitions.
[2022-10-15 16:25:04,239 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2022-10-15 16:25:04,240 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27
[2022-10-15 16:25:04,240 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:25:04,242 INFO  L225             Difference]: With dead ends: 127
[2022-10-15 16:25:04,242 INFO  L226             Difference]: Without dead ends: 127
[2022-10-15 16:25:04,243 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600
[2022-10-15 16:25:04,244 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 107 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-10-15 16:25:04,244 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 126 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 191 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time]
[2022-10-15 16:25:04,245 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 127 states.
[2022-10-15 16:25:04,251 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 103.
[2022-10-15 16:25:04,251 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 103 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 92 states have internal predecessors, (111), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-10-15 16:25:04,253 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions.
[2022-10-15 16:25:04,253 INFO  L78                 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 27
[2022-10-15 16:25:04,253 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:25:04,253 INFO  L495      AbstractCegarLoop]: Abstraction has 103 states and 125 transitions.
[2022-10-15 16:25:04,253 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-10-15 16:25:04,254 INFO  L276                IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions.
[2022-10-15 16:25:04,255 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2022-10-15 16:25:04,255 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:25:04,255 INFO  L195           NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:25:04,294 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2022-10-15 16:25:04,470 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2022-10-15 16:25:04,470 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:25:04,471 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:25:04,471 INFO  L85        PathProgramCache]: Analyzing trace with hash -1849777719, now seen corresponding path program 3 times
[2022-10-15 16:25:04,471 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:25:04,471 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422634407]
[2022-10-15 16:25:04,472 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:25:04,472 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:25:04,485 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:25:04,486 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503065556]
[2022-10-15 16:25:04,486 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-10-15 16:25:04,486 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:25:04,486 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:25:04,487 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)
[2022-10-15 16:25:04,506 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2022-10-15 16:25:04,542 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2022-10-15 16:25:04,543 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-10-15 16:25:04,544 INFO  L263         TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-10-15 16:25:04,547 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:25:04,577 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-10-15 16:25:05,683 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-10-15 16:25:05,683 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-10-15 16:25:12,946 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2022-10-15 16:25:12,946 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:25:12,946 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422634407]
[2022-10-15 16:25:12,946 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:25:12,947 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503065556]
[2022-10-15 16:25:12,947 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [503065556] provided 0 perfect and 2 imperfect interpolant sequences
[2022-10-15 16:25:12,947 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-10-15 16:25:12,947 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15
[2022-10-15 16:25:12,947 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824084412]
[2022-10-15 16:25:12,947 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-10-15 16:25:12,948 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2022-10-15 16:25:12,948 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:25:12,948 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2022-10-15 16:25:12,949 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240
[2022-10-15 16:25:12,949 INFO  L87              Difference]: Start difference. First operand 103 states and 125 transitions. Second operand  has 16 states, 15 states have (on average 2.6) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-10-15 16:25:18,312 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:25:18,312 INFO  L93              Difference]: Finished difference Result 201 states and 246 transitions.
[2022-10-15 16:25:18,313 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2022-10-15 16:25:18,313 INFO  L78                 Accepts]: Start accepts. Automaton has  has 16 states, 15 states have (on average 2.6) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26
[2022-10-15 16:25:18,319 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:25:18,321 INFO  L225             Difference]: With dead ends: 201
[2022-10-15 16:25:18,321 INFO  L226             Difference]: Without dead ends: 201
[2022-10-15 16:25:18,323 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870
[2022-10-15 16:25:18,325 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 299 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2022-10-15 16:25:18,326 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 88 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2022-10-15 16:25:18,328 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 201 states.
[2022-10-15 16:25:18,347 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 177.
[2022-10-15 16:25:18,351 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 177 states, 159 states have (on average 1.3018867924528301) internal successors, (207), 164 states have internal predecessors, (207), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-10-15 16:25:18,352 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 225 transitions.
[2022-10-15 16:25:18,352 INFO  L78                 Accepts]: Start accepts. Automaton has 177 states and 225 transitions. Word has length 26
[2022-10-15 16:25:18,353 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:25:18,353 INFO  L495      AbstractCegarLoop]: Abstraction has 177 states and 225 transitions.
[2022-10-15 16:25:18,353 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 15 states have (on average 2.6) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2022-10-15 16:25:18,353 INFO  L276                IsEmpty]: Start isEmpty. Operand 177 states and 225 transitions.
[2022-10-15 16:25:18,357 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2022-10-15 16:25:18,357 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:25:18,357 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:25:18,386 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2022-10-15 16:25:18,575 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:25:18,576 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:25:18,576 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:25:18,577 INFO  L85        PathProgramCache]: Analyzing trace with hash 932315781, now seen corresponding path program 2 times
[2022-10-15 16:25:18,577 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:25:18,577 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359089089]
[2022-10-15 16:25:18,577 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:25:18,578 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:25:18,588 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:25:18,588 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635482714]
[2022-10-15 16:25:18,588 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-10-15 16:25:18,589 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:25:18,589 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:25:18,590 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)
[2022-10-15 16:25:18,596 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2022-10-15 16:25:18,643 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-10-15 16:25:18,644 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-10-15 16:25:18,644 INFO  L263         TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-10-15 16:25:18,647 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:25:18,714 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-10-15 16:25:18,714 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2022-10-15 16:25:18,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-10-15 16:25:18,764 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:25:18,764 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359089089]
[2022-10-15 16:25:18,764 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:25:18,764 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635482714]
[2022-10-15 16:25:18,764 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635482714] provided 0 perfect and 2 imperfect interpolant sequences
[2022-10-15 16:25:18,765 INFO  L184   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-10-15 16:25:18,765 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11
[2022-10-15 16:25:18,765 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612127539]
[2022-10-15 16:25:18,765 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-10-15 16:25:18,766 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 11 states
[2022-10-15 16:25:18,766 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:25:18,766 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2022-10-15 16:25:18,766 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110
[2022-10-15 16:25:18,767 INFO  L87              Difference]: Start difference. First operand 177 states and 225 transitions. Second operand  has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-10-15 16:25:18,980 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:25:18,980 INFO  L93              Difference]: Finished difference Result 163 states and 198 transitions.
[2022-10-15 16:25:18,981 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2022-10-15 16:25:18,981 INFO  L78                 Accepts]: Start accepts. Automaton has  has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30
[2022-10-15 16:25:18,982 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:25:18,984 INFO  L225             Difference]: With dead ends: 163
[2022-10-15 16:25:18,984 INFO  L226             Difference]: Without dead ends: 157
[2022-10-15 16:25:18,985 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306
[2022-10-15 16:25:18,986 INFO  L413           NwaCegarLoop]: 29 mSDtfsCounter, 105 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-10-15 16:25:18,986 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 108 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-10-15 16:25:18,987 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 157 states.
[2022-10-15 16:25:18,991 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 140.
[2022-10-15 16:25:18,992 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 140 states, 124 states have (on average 1.282258064516129) internal successors, (159), 129 states have internal predecessors, (159), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-10-15 16:25:18,993 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 173 transitions.
[2022-10-15 16:25:18,993 INFO  L78                 Accepts]: Start accepts. Automaton has 140 states and 173 transitions. Word has length 30
[2022-10-15 16:25:18,993 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:25:18,993 INFO  L495      AbstractCegarLoop]: Abstraction has 140 states and 173 transitions.
[2022-10-15 16:25:18,994 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2022-10-15 16:25:18,994 INFO  L276                IsEmpty]: Start isEmpty. Operand 140 states and 173 transitions.
[2022-10-15 16:25:18,995 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2022-10-15 16:25:18,995 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:25:18,995 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]
[2022-10-15 16:25:19,025 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2022-10-15 16:25:19,209 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2022-10-15 16:25:19,209 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:25:19,210 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:25:19,210 INFO  L85        PathProgramCache]: Analyzing trace with hash -572907794, now seen corresponding path program 3 times
[2022-10-15 16:25:19,211 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:25:19,211 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77233646]
[2022-10-15 16:25:19,211 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:25:19,212 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:25:19,224 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:25:19,225 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945748748]
[2022-10-15 16:25:19,225 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-10-15 16:25:19,225 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:25:19,225 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:25:19,226 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)
[2022-10-15 16:25:19,228 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2022-10-15 16:25:19,804 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-10-15 16:25:19,804 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2022-10-15 16:25:19,806 INFO  L263         TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core
[2022-10-15 16:25:19,808 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:25:19,831 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2022-10-15 16:25:21,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2022-10-15 16:25:21,747 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-10-15 16:25:21,747 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-15 16:25:21,747 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77233646]
[2022-10-15 16:25:21,747 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-15 16:25:21,748 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945748748]
[2022-10-15 16:25:21,748 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945748748] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-15 16:25:21,748 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-15 16:25:21,748 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2022-10-15 16:25:21,748 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431989040]
[2022-10-15 16:25:21,749 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-15 16:25:21,749 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2022-10-15 16:25:21,749 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-15 16:25:21,750 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2022-10-15 16:25:21,750 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132
[2022-10-15 16:25:21,750 INFO  L87              Difference]: Start difference. First operand 140 states and 173 transitions. Second operand  has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-10-15 16:25:22,001 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-15 16:25:22,001 INFO  L93              Difference]: Finished difference Result 152 states and 184 transitions.
[2022-10-15 16:25:22,002 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2022-10-15 16:25:22,002 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36
[2022-10-15 16:25:22,002 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-15 16:25:22,005 INFO  L225             Difference]: With dead ends: 152
[2022-10-15 16:25:22,005 INFO  L226             Difference]: Without dead ends: 152
[2022-10-15 16:25:22,005 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210
[2022-10-15 16:25:22,006 INFO  L413           NwaCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-10-15 16:25:22,007 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 103 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time]
[2022-10-15 16:25:22,008 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 152 states.
[2022-10-15 16:25:22,012 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146.
[2022-10-15 16:25:22,013 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 146 states, 130 states have (on average 1.2384615384615385) internal successors, (161), 133 states have internal predecessors, (161), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)
[2022-10-15 16:25:22,014 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions.
[2022-10-15 16:25:22,014 INFO  L78                 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 36
[2022-10-15 16:25:22,014 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-15 16:25:22,015 INFO  L495      AbstractCegarLoop]: Abstraction has 146 states and 175 transitions.
[2022-10-15 16:25:22,015 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2022-10-15 16:25:22,015 INFO  L276                IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions.
[2022-10-15 16:25:22,016 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2022-10-15 16:25:22,016 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-15 16:25:22,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-15 16:25:22,025 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2022-10-15 16:25:22,221 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10
[2022-10-15 16:25:22,222 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] ===
[2022-10-15 16:25:22,223 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-15 16:25:22,223 INFO  L85        PathProgramCache]: Analyzing trace with hash -338390559, now seen corresponding path program 1 times
[2022-10-15 16:25:22,223 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-15 16:25:22,224 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345902193]
[2022-10-15 16:25:22,224 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:25:22,224 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-15 16:25:22,237 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-15 16:25:22,237 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52279890]
[2022-10-15 16:25:22,237 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-15 16:25:22,238 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-15 16:25:22,238 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2022-10-15 16:25:22,239 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)
[2022-10-15 16:25:22,241 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2022-10-15 16:25:22,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-15 16:25:22,350 INFO  L263         TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 47 conjunts are in the unsatisfiable core
[2022-10-15 16:25:22,355 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-15 16:25:22,443 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 40
[2022-10-15 16:25:22,451 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11
[2022-10-15 16:25:22,460 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11
[2022-10-15 16:25:23,022 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 61
[2022-10-15 16:25:23,034 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-10-15 16:25:23,035 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-10-15 16:25:23,036 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 121
[2022-10-15 16:25:23,054 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-10-15 16:25:23,055 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-10-15 16:25:23,057 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 16
[2022-10-15 16:25:23,236 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74
[2022-10-15 16:25:23,253 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-10-15 16:25:23,257 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-10-15 16:25:23,258 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 127
[2022-10-15 16:25:23,284 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-10-15 16:25:23,288 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-10-15 16:25:23,289 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 3
[2022-10-15 16:25:23,764 INFO  L173   IndexEqualityManager]: detected equality via solver
[2022-10-15 16:25:23,769 INFO  L356             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2022-10-15 16:25:23,770 INFO  L390             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 27
[2022-10-15 16:25:24,052 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-10-15 16:25:24,052 INFO  L328         TraceCheckSpWp]: Computing backward predicates...