./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b0fb0070f46fa34e60f2a21833c13b7b67c557f142ffbdfed9bc8ff3d84f7456 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:30:27,169 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:30:27,243 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:30:27,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:30:27,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:30:27,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:30:27,294 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:30:27,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:30:27,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:30:27,296 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:30:27,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:30:27,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:30:27,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:30:27,298 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:30:27,300 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:30:27,300 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:30:27,300 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:30:27,301 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:30:27,301 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:30:27,301 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:30:27,302 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:30:27,302 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:30:27,302 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:30:27,303 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:30:27,303 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:30:27,303 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:30:27,304 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:30:27,304 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:30:27,305 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:30:27,305 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:30:27,305 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:30:27,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:30:27,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:30:27,306 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:30:27,306 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:30:27,307 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:30:27,307 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:30:27,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:30:27,307 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:30:27,308 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:30:27,308 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:30:27,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:30:27,311 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0fb0070f46fa34e60f2a21833c13b7b67c557f142ffbdfed9bc8ff3d84f7456 [2024-10-13 22:30:27,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:30:27,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:30:27,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:30:27,618 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:30:27,619 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:30:27,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3.c [2024-10-13 22:30:29,075 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:30:29,270 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:30:29,272 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3.c [2024-10-13 22:30:29,281 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e101c1f2a/6ae2c6812f65408aa322ebc8bb1b64bf/FLAGb7518b22e [2024-10-13 22:30:29,296 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e101c1f2a/6ae2c6812f65408aa322ebc8bb1b64bf [2024-10-13 22:30:29,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:30:29,302 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:30:29,304 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:30:29,304 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:30:29,310 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:30:29,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44570a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29, skipping insertion in model container [2024-10-13 22:30:29,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,336 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:30:29,501 WARN L248 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-fpi/eqn3.c[587,600] [2024-10-13 22:30:29,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:30:29,543 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:30:29,557 WARN L248 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-fpi/eqn3.c[587,600] [2024-10-13 22:30:29,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:30:29,591 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:30:29,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29 WrapperNode [2024-10-13 22:30:29,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:30:29,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:30:29,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:30:29,594 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:30:29,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,609 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,641 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-10-13 22:30:29,643 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:30:29,644 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:30:29,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:30:29,644 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:30:29,654 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,658 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,676 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 7, 4, 4]. 41 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2024-10-13 22:30:29,677 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,677 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,682 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,686 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,690 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,691 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,698 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:30:29,698 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:30:29,699 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:30:29,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:30:29,699 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (1/1) ... [2024-10-13 22:30:29,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:30:29,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:29,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 22:30:29,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 22:30:29,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:30:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:30:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:30:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 22:30:29,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 22:30:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:30:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:30:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 22:30:29,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 22:30:29,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 22:30:29,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:30:29,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:30:29,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:30:29,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:30:29,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 22:30:29,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 22:30:29,862 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:30:29,863 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:30:30,061 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-13 22:30:30,061 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:30:30,098 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:30:30,099 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 22:30:30,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:30:30 BoogieIcfgContainer [2024-10-13 22:30:30,099 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:30:30,104 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:30:30,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:30:30,108 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:30:30,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:30:29" (1/3) ... [2024-10-13 22:30:30,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fe244a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:30:30, skipping insertion in model container [2024-10-13 22:30:30,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:30:29" (2/3) ... [2024-10-13 22:30:30,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fe244a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:30:30, skipping insertion in model container [2024-10-13 22:30:30,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:30:30" (3/3) ... [2024-10-13 22:30:30,113 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn3.c [2024-10-13 22:30:30,130 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:30:30,130 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:30:30,191 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:30:30,196 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33a8ad77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:30:30,197 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:30:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-13 22:30:30,208 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:30,209 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:30,209 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:30,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash -841652609, now seen corresponding path program 1 times [2024-10-13 22:30:30,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:30,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41033700] [2024-10-13 22:30:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:30,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:30,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:30,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41033700] [2024-10-13 22:30:30,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41033700] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:30:30,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:30:30,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 22:30:30,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469885409] [2024-10-13 22:30:30,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:30:30,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:30:30,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:30:30,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:30:30,410 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:30,441 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2024-10-13 22:30:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:30:30,444 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-13 22:30:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:30,467 INFO L225 Difference]: With dead ends: 29 [2024-10-13 22:30:30,467 INFO L226 Difference]: Without dead ends: 13 [2024-10-13 22:30:30,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:30:30,476 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:30,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:30:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-13 22:30:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-13 22:30:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-10-13 22:30:30,521 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2024-10-13 22:30:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:30,521 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-10-13 22:30:30,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-10-13 22:30:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-13 22:30:30,522 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:30,522 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:30,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:30:30,523 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:30,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash -161594239, now seen corresponding path program 1 times [2024-10-13 22:30:30,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:30,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477157409] [2024-10-13 22:30:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:30:30,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271211531] [2024-10-13 22:30:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:30,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:30,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:30,600 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) [2024-10-13 22:30:30,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:30:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:30,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 22:30:30,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:30,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:30:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:30,843 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:30:30,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477157409] [2024-10-13 22:30:30,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:30:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271211531] [2024-10-13 22:30:30,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271211531] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:30:30,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:30:30,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 22:30:30,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298337764] [2024-10-13 22:30:30,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:30:30,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 22:30:30,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 22:30:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:30:30,849 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:30,919 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-10-13 22:30:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 22:30:30,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-13 22:30:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:30,921 INFO L225 Difference]: With dead ends: 25 [2024-10-13 22:30:30,921 INFO L226 Difference]: Without dead ends: 23 [2024-10-13 22:30:30,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:30:30,922 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:30,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-13 22:30:30,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2024-10-13 22:30:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-10-13 22:30:30,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2024-10-13 22:30:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:30,932 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-10-13 22:30:30,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-10-13 22:30:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 22:30:30,933 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:30,933 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:30,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 22:30:31,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:31,136 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:31,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:31,137 INFO L85 PathProgramCache]: Analyzing trace with hash 423082541, now seen corresponding path program 1 times [2024-10-13 22:30:31,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:31,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726627824] [2024-10-13 22:30:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:31,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:31,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:31,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726627824] [2024-10-13 22:30:31,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726627824] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:30:31,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:30:31,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 22:30:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636403910] [2024-10-13 22:30:31,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:30:31,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 22:30:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 22:30:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:30:31,399 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:31,453 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-10-13 22:30:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 22:30:31,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-13 22:30:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:31,455 INFO L225 Difference]: With dead ends: 32 [2024-10-13 22:30:31,455 INFO L226 Difference]: Without dead ends: 25 [2024-10-13 22:30:31,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:30:31,457 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:31,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:30:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-13 22:30:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2024-10-13 22:30:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-13 22:30:31,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2024-10-13 22:30:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:31,465 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-13 22:30:31,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-13 22:30:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-13 22:30:31,466 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:31,466 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:31,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 22:30:31,467 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:31,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:31,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1129310352, now seen corresponding path program 1 times [2024-10-13 22:30:31,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:31,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155709777] [2024-10-13 22:30:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:31,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:30:31,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835591922] [2024-10-13 22:30:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:31,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:31,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:31,570 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) [2024-10-13 22:30:31,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:30:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:31,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 22:30:31,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:31,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:30:31,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-13 22:30:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:31,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:32,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:32,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155709777] [2024-10-13 22:30:32,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:30:32,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835591922] [2024-10-13 22:30:32,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835591922] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:32,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:30:32,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-10-13 22:30:32,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697118057] [2024-10-13 22:30:32,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:32,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 22:30:32,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:32,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 22:30:32,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-13 22:30:32,026 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:32,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:32,157 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2024-10-13 22:30:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 22:30:32,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-13 22:30:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:32,161 INFO L225 Difference]: With dead ends: 44 [2024-10-13 22:30:32,161 INFO L226 Difference]: Without dead ends: 42 [2024-10-13 22:30:32,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-13 22:30:32,162 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:32,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 35 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:32,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-13 22:30:32,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 22. [2024-10-13 22:30:32,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-10-13 22:30:32,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2024-10-13 22:30:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:32,174 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-10-13 22:30:32,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-10-13 22:30:32,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 22:30:32,176 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:32,176 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:32,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:32,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-13 22:30:32,377 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:32,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash 609478985, now seen corresponding path program 1 times [2024-10-13 22:30:32,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:32,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130965551] [2024-10-13 22:30:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:32,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:32,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130965551] [2024-10-13 22:30:32,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130965551] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705971656] [2024-10-13 22:30:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:32,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:32,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:32,515 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) [2024-10-13 22:30:32,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:30:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:32,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 22:30:32,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:32,645 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:30:32,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705971656] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:30:32,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:30:32,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-10-13 22:30:32,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526411002] [2024-10-13 22:30:32,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:30:32,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 22:30:32,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:32,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 22:30:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-13 22:30:32,648 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:32,757 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-10-13 22:30:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 22:30:32,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-13 22:30:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:32,758 INFO L225 Difference]: With dead ends: 37 [2024-10-13 22:30:32,759 INFO L226 Difference]: Without dead ends: 25 [2024-10-13 22:30:32,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-10-13 22:30:32,760 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:32,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-13 22:30:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2024-10-13 22:30:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-13 22:30:32,809 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2024-10-13 22:30:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:32,809 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-13 22:30:32,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-13 22:30:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-13 22:30:32,810 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:32,810 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:32,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 22:30:33,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:33,011 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:33,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash 681956944, now seen corresponding path program 2 times [2024-10-13 22:30:33,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:33,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040747284] [2024-10-13 22:30:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:33,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:33,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:33,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040747284] [2024-10-13 22:30:33,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040747284] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:33,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570354793] [2024-10-13 22:30:33,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:30:33,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:33,172 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) [2024-10-13 22:30:33,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:30:33,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:30:33,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:33,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 22:30:33,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:33,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:33,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570354793] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:33,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2024-10-13 22:30:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931005463] [2024-10-13 22:30:33,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:33,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 22:30:33,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 22:30:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-10-13 22:30:33,345 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:33,454 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-10-13 22:30:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 22:30:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-13 22:30:33,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:33,455 INFO L225 Difference]: With dead ends: 53 [2024-10-13 22:30:33,455 INFO L226 Difference]: Without dead ends: 42 [2024-10-13 22:30:33,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-10-13 22:30:33,456 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:33,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 40 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-13 22:30:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2024-10-13 22:30:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-10-13 22:30:33,463 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2024-10-13 22:30:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:33,463 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-10-13 22:30:33,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-10-13 22:30:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 22:30:33,464 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:33,464 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:33,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 22:30:33,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:33,665 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:33,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:33,665 INFO L85 PathProgramCache]: Analyzing trace with hash 810981082, now seen corresponding path program 1 times [2024-10-13 22:30:33,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:33,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123732261] [2024-10-13 22:30:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:33,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:30:33,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557485286] [2024-10-13 22:30:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:33,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:33,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:33,711 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) [2024-10-13 22:30:33,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:30:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:33,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 22:30:33,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:33,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:30:33,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:30:33,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-13 22:30:33,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-13 22:30:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:34,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:34,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:34,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123732261] [2024-10-13 22:30:34,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:30:34,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557485286] [2024-10-13 22:30:34,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557485286] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:34,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:30:34,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-10-13 22:30:34,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695296667] [2024-10-13 22:30:34,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:34,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 22:30:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 22:30:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:30:34,636 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:35,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:35,811 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-10-13 22:30:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 22:30:35,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-13 22:30:35,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:35,812 INFO L225 Difference]: With dead ends: 60 [2024-10-13 22:30:35,812 INFO L226 Difference]: Without dead ends: 58 [2024-10-13 22:30:35,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2024-10-13 22:30:35,814 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:35,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 114 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 22:30:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-13 22:30:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2024-10-13 22:30:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-13 22:30:35,824 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 16 [2024-10-13 22:30:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:35,825 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-13 22:30:35,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-13 22:30:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 22:30:35,826 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:35,826 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:35,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:36,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:36,031 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:36,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:36,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1130108659, now seen corresponding path program 3 times [2024-10-13 22:30:36,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:36,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457638785] [2024-10-13 22:30:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:36,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:36,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:36,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457638785] [2024-10-13 22:30:36,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457638785] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:36,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104410297] [2024-10-13 22:30:36,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:30:36,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:36,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:36,177 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) [2024-10-13 22:30:36,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:30:36,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 22:30:36,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:36,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 22:30:36,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:36,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:30:36,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104410297] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:36,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:36,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-13 22:30:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90604652] [2024-10-13 22:30:36,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:36,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:30:36,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:30:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:30:36,427 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:36,569 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2024-10-13 22:30:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 22:30:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-13 22:30:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:36,570 INFO L225 Difference]: With dead ends: 64 [2024-10-13 22:30:36,570 INFO L226 Difference]: Without dead ends: 57 [2024-10-13 22:30:36,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-10-13 22:30:36,571 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:36,571 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 55 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:30:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-13 22:30:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2024-10-13 22:30:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-10-13 22:30:36,580 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 16 [2024-10-13 22:30:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:36,581 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-10-13 22:30:36,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-10-13 22:30:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-13 22:30:36,582 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:36,582 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:36,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:36,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:36,787 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:36,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:36,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1469567504, now seen corresponding path program 4 times [2024-10-13 22:30:36,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:36,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635855565] [2024-10-13 22:30:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:36,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:30:36,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494937702] [2024-10-13 22:30:36,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:30:36,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:36,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:36,859 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) [2024-10-13 22:30:36,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:30:37,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:30:37,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:37,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-13 22:30:37,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:37,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:30:37,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-13 22:30:37,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-13 22:30:37,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-13 22:30:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:30:37,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 22:30:58,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:58,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635855565] [2024-10-13 22:30:58,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 22:30:58,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494937702] [2024-10-13 22:30:58,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494937702] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:58,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:30:58,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-10-13 22:30:58,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266152003] [2024-10-13 22:30:58,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:58,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 22:30:58,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:58,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 22:30:58,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=110, Unknown=2, NotChecked=0, Total=156 [2024-10-13 22:30:58,187 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:58,895 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2024-10-13 22:30:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 22:30:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-13 22:30:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:58,898 INFO L225 Difference]: With dead ends: 83 [2024-10-13 22:30:58,898 INFO L226 Difference]: Without dead ends: 81 [2024-10-13 22:30:58,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=51, Invalid=129, Unknown=2, NotChecked=0, Total=182 [2024-10-13 22:30:58,899 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:58,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 80 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 22:30:58,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-13 22:30:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 36. [2024-10-13 22:30:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-10-13 22:30:58,910 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 17 [2024-10-13 22:30:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:58,910 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-10-13 22:30:58,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-10-13 22:30:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 22:30:58,911 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:58,911 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:58,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 22:30:59,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:59,112 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:30:59,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:30:59,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1461767366, now seen corresponding path program 2 times [2024-10-13 22:30:59,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:30:59,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565241860] [2024-10-13 22:30:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:30:59,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:30:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:30:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 22:30:59,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:30:59,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565241860] [2024-10-13 22:30:59,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565241860] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:30:59,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612115101] [2024-10-13 22:30:59,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:30:59,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:30:59,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:30:59,265 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) [2024-10-13 22:30:59,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 22:30:59,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:30:59,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:30:59,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 22:30:59,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:30:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 22:30:59,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:30:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 22:30:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612115101] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:30:59,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:30:59,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-10-13 22:30:59,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943231285] [2024-10-13 22:30:59,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:30:59,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:30:59,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:30:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:30:59,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:30:59,472 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:30:59,834 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2024-10-13 22:30:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-13 22:30:59,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 22:30:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:30:59,835 INFO L225 Difference]: With dead ends: 81 [2024-10-13 22:30:59,835 INFO L226 Difference]: Without dead ends: 69 [2024-10-13 22:30:59,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2024-10-13 22:30:59,836 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:30:59,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 93 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:30:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-13 22:30:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 35. [2024-10-13 22:30:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-10-13 22:30:59,847 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 18 [2024-10-13 22:30:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:30:59,847 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-10-13 22:30:59,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:30:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-10-13 22:30:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 22:30:59,848 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:30:59,848 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:30:59,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 22:31:00,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 22:31:00,049 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:31:00,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:31:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash 751488080, now seen corresponding path program 3 times [2024-10-13 22:31:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:31:00,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831409331] [2024-10-13 22:31:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:31:00,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:31:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:31:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:31:00,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:31:00,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831409331] [2024-10-13 22:31:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831409331] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:31:00,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464291166] [2024-10-13 22:31:00,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:31:00,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:00,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:31:00,166 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) [2024-10-13 22:31:00,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 22:31:00,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 22:31:00,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:31:00,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 22:31:00,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:31:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:31:00,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:31:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:31:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464291166] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:31:00,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:31:00,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-10-13 22:31:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800954576] [2024-10-13 22:31:00,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:31:00,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 22:31:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:31:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 22:31:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-10-13 22:31:00,400 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:31:00,505 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2024-10-13 22:31:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 22:31:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-13 22:31:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:31:00,506 INFO L225 Difference]: With dead ends: 62 [2024-10-13 22:31:00,506 INFO L226 Difference]: Without dead ends: 46 [2024-10-13 22:31:00,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-10-13 22:31:00,507 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:31:00,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 47 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:31:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-13 22:31:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2024-10-13 22:31:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-10-13 22:31:00,516 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 19 [2024-10-13 22:31:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:31:00,517 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-10-13 22:31:00,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:31:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-10-13 22:31:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-13 22:31:00,518 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:31:00,518 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:31:00,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 22:31:00,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:00,719 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:31:00,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:31:00,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1278749318, now seen corresponding path program 4 times [2024-10-13 22:31:00,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:31:00,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681834519] [2024-10-13 22:31:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:31:00,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:31:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 22:31:00,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460440396] [2024-10-13 22:31:00,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:31:00,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:31:00,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:31:00,884 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) [2024-10-13 22:31:00,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 22:31:01,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:31:01,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:31:01,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-13 22:31:01,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:31:01,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:31:01,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 22:31:01,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-13 22:31:01,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:31:01,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-13 22:31:01,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:31:01,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-10-13 22:31:01,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-13 22:31:01,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:31:01,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-10-13 22:31:01,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:31:01,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-10-13 22:31:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:31:01,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:31:22,880 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-13 22:31:31,688 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse17 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) (let ((.cse9 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse5 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse18 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse3 (* .cse6 8)) (.cse0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse10 (* .cse17 8))) (let ((.cse12 (< .cse17 2147483648)) (.cse7 (< 2147483647 .cse6)) (.cse14 (+ .cse10 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse15 (select |c_#memory_int#3| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse16 (* 8 .cse0)) (.cse8 (+ .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse4 (+ (* 8 .cse18) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse1 (or (< .cse18 2147483648) (= 7 (select .cse9 .cse5)))) (.cse13 (< 2147483647 .cse17))) (and (or (< .cse0 2147483648) (let ((.cse11 (+ (select .cse15 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse16)) (select .cse9 (+ (- 34359738368) .cse16 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (and (or (let ((.cse2 (store .cse9 (+ .cse10 (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|) .cse11))) (and .cse1 (or (forall ((v_DerPreprocessor_14 Int) (v_DerPreprocessor_11 Int)) (= 7 (select (store (store .cse2 (+ .cse3 (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|) v_DerPreprocessor_14) .cse4 v_DerPreprocessor_11) .cse5))) (< .cse6 2147483648)) (or .cse7 (forall ((v_DerPreprocessor_13 Int) (v_DerPreprocessor_11 Int)) (= 7 (select (store (store .cse2 .cse8 v_DerPreprocessor_13) .cse4 v_DerPreprocessor_11) .cse5)))))) .cse12) (or .cse13 (and (<= .cse6 2147483647) (forall ((v_DerPreprocessor_13 Int) (v_DerPreprocessor_11 Int)) (= 7 (select (store (store (store .cse9 .cse14 .cse11) .cse8 v_DerPreprocessor_13) .cse4 v_DerPreprocessor_11) .cse5)))))))) (or (and (or (and (<= 2147483648 .cse6) .cse1) .cse12) (or (and (or .cse7 (forall ((v_DerPreprocessor_13 Int) (v_DerPreprocessor_11 Int)) (= 7 (select (store (store (store .cse9 .cse14 (+ (select .cse9 (+ .cse16 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse15 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse16)))) .cse8 v_DerPreprocessor_13) .cse4 v_DerPreprocessor_11) .cse5)))) .cse1) .cse13)) (< 2147483647 .cse0)))))) is different from false [2024-10-13 22:31:48,119 WARN L286 SmtUtils]: Spent 12.05s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-13 22:31:56,179 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)