./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/eqn2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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/eqn2f.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 9492838383a14835fe4416045232ed048098976ee70d4c4f9afc54e7ded61319 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 15:02:01,035 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 15:02:01,096 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 15:02:01,099 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 15:02:01,099 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 15:02:01,132 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 15:02:01,133 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 15:02:01,133 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 15:02:01,133 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 15:02:01,134 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 15:02:01,134 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 15:02:01,134 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 15:02:01,135 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 15:02:01,135 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 15:02:01,135 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 15:02:01,136 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 15:02:01,136 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 15:02:01,136 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 15:02:01,136 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 15:02:01,136 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 15:02:01,137 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 15:02:01,140 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 15:02:01,140 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 15:02:01,141 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 15:02:01,141 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 15:02:01,141 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 15:02:01,141 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 15:02:01,141 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 15:02:01,142 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 15:02:01,142 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 15:02:01,142 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 15:02:01,142 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 15:02:01,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:02:01,142 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 15:02:01,143 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 15:02:01,143 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 15:02:01,143 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 15:02:01,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 15:02:01,143 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 15:02:01,143 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 15:02:01,143 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 15:02:01,144 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 15:02:01,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9492838383a14835fe4416045232ed048098976ee70d4c4f9afc54e7ded61319 [2024-10-12 15:02:01,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 15:02:01,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 15:02:01,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 15:02:01,387 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 15:02:01,387 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 15:02:01,388 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c [2024-10-12 15:02:02,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 15:02:03,079 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 15:02:03,080 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c [2024-10-12 15:02:03,086 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e929fa84/5fda4a9440ae4f27a6a84ccfdc405884/FLAGbe3ccb8e1 [2024-10-12 15:02:03,102 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e929fa84/5fda4a9440ae4f27a6a84ccfdc405884 [2024-10-12 15:02:03,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 15:02:03,105 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 15:02:03,106 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 15:02:03,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 15:02:03,111 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 15:02:03,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21af2991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03, skipping insertion in model container [2024-10-12 15:02:03,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,136 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 15:02:03,318 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/eqn2f.c[588,601] [2024-10-12 15:02:03,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:02:03,355 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 15:02:03,369 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/eqn2f.c[588,601] [2024-10-12 15:02:03,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:02:03,398 INFO L204 MainTranslator]: Completed translation [2024-10-12 15:02:03,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03 WrapperNode [2024-10-12 15:02:03,400 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 15:02:03,401 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 15:02:03,401 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 15:02:03,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 15:02:03,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,416 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,435 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2024-10-12 15:02:03,436 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 15:02:03,436 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 15:02:03,437 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 15:02:03,437 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 15:02:03,446 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,449 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,470 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 8, 4, 4]. 44 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2024-10-12 15:02:03,473 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,485 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,487 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,488 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,490 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 15:02:03,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 15:02:03,491 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 15:02:03,491 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 15:02:03,492 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (1/1) ... [2024-10-12 15:02:03,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:02:03,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:03,523 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) [2024-10-12 15:02:03,526 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 [2024-10-12 15:02:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 15:02:03,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 15:02:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 15:02:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 15:02:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-12 15:02:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 15:02:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 15:02:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 15:02:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-12 15:02:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 15:02:03,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 15:02:03,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 15:02:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 15:02:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 15:02:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 15:02:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-12 15:02:03,679 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 15:02:03,681 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 15:02:03,867 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-12 15:02:03,870 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 15:02:03,895 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 15:02:03,899 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 15:02:03,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:02:03 BoogieIcfgContainer [2024-10-12 15:02:03,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 15:02:03,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 15:02:03,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 15:02:03,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 15:02:03,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:02:03" (1/3) ... [2024-10-12 15:02:03,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdb3fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:02:03, skipping insertion in model container [2024-10-12 15:02:03,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:02:03" (2/3) ... [2024-10-12 15:02:03,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fdb3fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:02:03, skipping insertion in model container [2024-10-12 15:02:03,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:02:03" (3/3) ... [2024-10-12 15:02:03,908 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2024-10-12 15:02:03,924 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 15:02:03,925 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 15:02:03,976 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 15:02:03,983 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;@52b12038, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 15:02:03,983 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 15:02:03,986 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) [2024-10-12 15:02:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-12 15:02:03,991 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:03,991 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:03,992 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:03,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash -841652609, now seen corresponding path program 1 times [2024-10-12 15:02:04,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:04,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597117282] [2024-10-12 15:02:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:04,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:04,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:04,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597117282] [2024-10-12 15:02:04,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597117282] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:02:04,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:02:04,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:02:04,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160851160] [2024-10-12 15:02:04,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:02:04,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 15:02:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 15:02:04,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:02:04,162 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) [2024-10-12 15:02:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:04,191 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2024-10-12 15:02:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 15:02:04,193 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 [2024-10-12 15:02:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:04,199 INFO L225 Difference]: With dead ends: 29 [2024-10-12 15:02:04,200 INFO L226 Difference]: Without dead ends: 13 [2024-10-12 15:02:04,203 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 [2024-10-12 15:02:04,207 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 [2024-10-12 15:02:04,209 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] [2024-10-12 15:02:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-12 15:02:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-12 15:02:04,234 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) [2024-10-12 15:02:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-10-12 15:02:04,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2024-10-12 15:02:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:04,237 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-10-12 15:02:04,237 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) [2024-10-12 15:02:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-10-12 15:02:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-12 15:02:04,239 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:04,239 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:04,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 15:02:04,240 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:04,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash -161594239, now seen corresponding path program 1 times [2024-10-12 15:02:04,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:04,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674121818] [2024-10-12 15:02:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:04,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:02:04,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822274990] [2024-10-12 15:02:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:04,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:04,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:04,334 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) [2024-10-12 15:02:04,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 15:02:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:04,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 15:02:04,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:04,490 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 [2024-10-12 15:02:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:04,624 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:02:04,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674121818] [2024-10-12 15:02:04,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 15:02:04,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822274990] [2024-10-12 15:02:04,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822274990] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:02:04,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:02:04,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 15:02:04,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955959302] [2024-10-12 15:02:04,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:02:04,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 15:02:04,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:04,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 15:02:04,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 15:02:04,628 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) [2024-10-12 15:02:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:04,694 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-10-12 15:02:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 15:02:04,695 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 [2024-10-12 15:02:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:04,696 INFO L225 Difference]: With dead ends: 25 [2024-10-12 15:02:04,696 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 15:02:04,696 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 [2024-10-12 15:02:04,698 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:04,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:02:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 15:02:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2024-10-12 15:02:04,706 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) [2024-10-12 15:02:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-10-12 15:02:04,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2024-10-12 15:02:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:04,707 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-10-12 15:02:04,707 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) [2024-10-12 15:02:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-10-12 15:02:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 15:02:04,708 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:04,708 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:04,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:04,908 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 [2024-10-12 15:02:04,910 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:04,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:04,911 INFO L85 PathProgramCache]: Analyzing trace with hash 423082541, now seen corresponding path program 1 times [2024-10-12 15:02:04,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:04,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48323051] [2024-10-12 15:02:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:04,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:05,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:05,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48323051] [2024-10-12 15:02:05,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48323051] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:02:05,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:02:05,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 15:02:05,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874736347] [2024-10-12 15:02:05,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:02:05,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 15:02:05,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:05,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 15:02:05,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-12 15:02:05,034 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) [2024-10-12 15:02:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:05,066 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-10-12 15:02:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 15:02:05,066 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 [2024-10-12 15:02:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:05,067 INFO L225 Difference]: With dead ends: 32 [2024-10-12 15:02:05,067 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 15:02:05,067 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 [2024-10-12 15:02:05,068 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 [2024-10-12 15:02:05,068 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] [2024-10-12 15:02:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 15:02:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2024-10-12 15:02:05,072 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) [2024-10-12 15:02:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-12 15:02:05,072 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2024-10-12 15:02:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:05,073 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-12 15:02:05,073 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) [2024-10-12 15:02:05,073 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-12 15:02:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-12 15:02:05,074 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:05,074 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:05,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 15:02:05,074 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:05,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:05,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1129310352, now seen corresponding path program 1 times [2024-10-12 15:02:05,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:05,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302277449] [2024-10-12 15:02:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:05,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:02:05,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510423963] [2024-10-12 15:02:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:05,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:05,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:05,118 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) [2024-10-12 15:02:05,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 15:02:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:05,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 15:02:05,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:05,220 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 [2024-10-12 15:02:05,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2024-10-12 15:02:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:02:05,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-12 15:02:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:02:05,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:05,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-10-12 15:02:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:02:05,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:05,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302277449] [2024-10-12 15:02:05,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 15:02:05,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510423963] [2024-10-12 15:02:05,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510423963] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:05,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 15:02:05,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2024-10-12 15:02:05,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905847367] [2024-10-12 15:02:05,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:05,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 15:02:05,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:05,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 15:02:05,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-12 15:02:05,443 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:05,490 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-10-12 15:02:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 15:02:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-12 15:02:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:05,491 INFO L225 Difference]: With dead ends: 25 [2024-10-12 15:02:05,491 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 15:02:05,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-12 15:02:05,492 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:05,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 27 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:02:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 15:02:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2024-10-12 15:02:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-10-12 15:02:05,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-10-12 15:02:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:05,497 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-10-12 15:02:05,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-10-12 15:02:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 15:02:05,498 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:05,498 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:05,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:05,701 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 [2024-10-12 15:02:05,702 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:05,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:05,703 INFO L85 PathProgramCache]: Analyzing trace with hash 609478985, now seen corresponding path program 1 times [2024-10-12 15:02:05,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:05,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378222447] [2024-10-12 15:02:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:05,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:05,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:05,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378222447] [2024-10-12 15:02:05,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378222447] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:05,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968962382] [2024-10-12 15:02:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:05,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:05,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:05,799 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) [2024-10-12 15:02:05,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 15:02:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:05,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-12 15:02:05,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:05,904 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:02:05,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968962382] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:02:05,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:02:05,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-10-12 15:02:05,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378958601] [2024-10-12 15:02:05,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:02:05,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 15:02:05,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:05,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 15:02:05,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-12 15:02:05,905 INFO L87 Difference]: Start difference. First operand 18 states and 21 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) [2024-10-12 15:02:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:05,946 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-10-12 15:02:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:02:05,946 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 [2024-10-12 15:02:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:05,947 INFO L225 Difference]: With dead ends: 30 [2024-10-12 15:02:05,947 INFO L226 Difference]: Without dead ends: 18 [2024-10-12 15:02:05,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:02:05,948 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:05,948 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:02:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-12 15:02:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2024-10-12 15:02:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2024-10-12 15:02:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-10-12 15:02:05,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2024-10-12 15:02:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:05,951 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-10-12 15:02:05,951 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) [2024-10-12 15:02:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-10-12 15:02:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 15:02:05,952 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:05,952 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:05,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:06,156 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 [2024-10-12 15:02:06,157 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:06,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash 810981082, now seen corresponding path program 1 times [2024-10-12 15:02:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:06,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118499707] [2024-10-12 15:02:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:02:06,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169168945] [2024-10-12 15:02:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:06,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:06,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:06,196 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) [2024-10-12 15:02:06,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 15:02:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-12 15:02:06,256 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-12 15:02:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-12 15:02:06,281 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-12 15:02:06,281 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-12 15:02:06,282 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-12 15:02:06,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:06,488 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 [2024-10-12 15:02:06,492 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-10-12 15:02:06,508 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-12 15:02:06,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:02:06 BoogieIcfgContainer [2024-10-12 15:02:06,510 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-12 15:02:06,511 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-12 15:02:06,511 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-12 15:02:06,511 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-12 15:02:06,511 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:02:03" (3/4) ... [2024-10-12 15:02:06,512 INFO L133 WitnessPrinter]: Generating witness for reachability counterexample [2024-10-12 15:02:06,538 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-12 15:02:06,538 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-12 15:02:06,539 INFO L158 Benchmark]: Toolchain (without parser) took 3433.61ms. Allocated memory was 142.6MB in the beginning and 209.7MB in the end (delta: 67.1MB). Free memory was 70.2MB in the beginning and 152.3MB in the end (delta: -82.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-12 15:02:06,539 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 105.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-12 15:02:06,539 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.87ms. Allocated memory is still 142.6MB. Free memory was 70.2MB in the beginning and 57.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-12 15:02:06,539 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.07ms. Allocated memory is still 142.6MB. Free memory was 57.6MB in the beginning and 55.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-12 15:02:06,540 INFO L158 Benchmark]: Boogie Preprocessor took 53.73ms. Allocated memory is still 142.6MB. Free memory was 55.9MB in the beginning and 53.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-12 15:02:06,540 INFO L158 Benchmark]: RCFGBuilder took 408.69ms. Allocated memory was 142.6MB in the beginning and 209.7MB in the end (delta: 67.1MB). Free memory was 53.7MB in the beginning and 173.6MB in the end (delta: -119.9MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. [2024-10-12 15:02:06,540 INFO L158 Benchmark]: TraceAbstraction took 2609.16ms. Allocated memory is still 209.7MB. Free memory was 173.6MB in the beginning and 154.4MB in the end (delta: 19.2MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2024-10-12 15:02:06,540 INFO L158 Benchmark]: Witness Printer took 27.59ms. Allocated memory is still 209.7MB. Free memory was 154.4MB in the beginning and 152.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-12 15:02:06,543 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 105.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.87ms. Allocated memory is still 142.6MB. Free memory was 70.2MB in the beginning and 57.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.07ms. Allocated memory is still 142.6MB. Free memory was 57.6MB in the beginning and 55.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.73ms. Allocated memory is still 142.6MB. Free memory was 55.9MB in the beginning and 53.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 408.69ms. Allocated memory was 142.6MB in the beginning and 209.7MB in the end (delta: 67.1MB). Free memory was 53.7MB in the beginning and 173.6MB in the end (delta: -119.9MB). Peak memory consumption was 19.3MB. Max. memory is 16.1GB. * TraceAbstraction took 2609.16ms. Allocated memory is still 209.7MB. Free memory was 173.6MB in the beginning and 154.4MB in the end (delta: 19.2MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. * Witness Printer took 27.59ms. Allocated memory is still 209.7MB. Free memory was 154.4MB in the beginning and 152.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 VAL [N=2, a={-2:0}, b={-1:0}, i=1] [L34] COND TRUE i