./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s2if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/array-fpi/s2if.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 42b59db67e4ff104bf70a3f31bfda20f06e9930727bb99d5ddebd47ecfc54cb7 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 10:17:58,470 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:17:58,522 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:17:58,527 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:17:58,527 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:17:58,548 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:17:58,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:17:58,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:17:58,550 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:17:58,552 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:17:58,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:17:58,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:17:58,553 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:17:58,555 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:17:58,555 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:17:58,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:17:58,556 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:17:58,556 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:17:58,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:17:58,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:17:58,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:17:58,557 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:17:58,557 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:17:58,557 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:17:58,557 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:17:58,557 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:17:58,558 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:17:58,558 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:17:58,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:17:58,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:17:58,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:17:58,559 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:17:58,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:17:58,560 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:17:58,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:17:58,560 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:17:58,560 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:17:58,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:17:58,561 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:17:58,561 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:17:58,561 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:17:58,561 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:17:58,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42b59db67e4ff104bf70a3f31bfda20f06e9930727bb99d5ddebd47ecfc54cb7 [2024-11-08 10:17:58,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:17:58,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:17:58,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:17:58,794 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:17:58,794 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:17:58,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2if.c [2024-11-08 10:18:00,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:18:00,192 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:18:00,192 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2if.c [2024-11-08 10:18:00,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c8819a93/5ed577f65fc24f9a81b9ae4a15bba397/FLAGd53ebe980 [2024-11-08 10:18:00,585 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c8819a93/5ed577f65fc24f9a81b9ae4a15bba397 [2024-11-08 10:18:00,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:18:00,588 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:18:00,589 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:18:00,589 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:18:00,593 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:18:00,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbfdb16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00, skipping insertion in model container [2024-11-08 10:18:00,596 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,608 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:18:00,728 WARN L250 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/s2if.c[587,600] [2024-11-08 10:18:00,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:18:00,745 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:18:00,753 WARN L250 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/s2if.c[587,600] [2024-11-08 10:18:00,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:18:00,768 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:18:00,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00 WrapperNode [2024-11-08 10:18:00,769 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:18:00,769 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:18:00,770 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:18:00,770 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:18:00,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,799 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-11-08 10:18:00,799 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:18:00,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:18:00,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:18:00,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:18:00,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,810 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,820 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 7, 6, 4]. 37 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, 3, 1]. [2024-11-08 10:18:00,820 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,820 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,827 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,829 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:18:00,829 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:18:00,829 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:18:00,830 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:18:00,830 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (1/1) ... [2024-11-08 10:18:00,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:18:00,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:00,856 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) [2024-11-08 10:18:00,857 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 [2024-11-08 10:18:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:18:00,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:18:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:18:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 10:18:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 10:18:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 10:18:00,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:18:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:18:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 10:18:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 10:18:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 10:18:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:18:00,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:18:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:18:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:18:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 10:18:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 10:18:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 10:18:00,947 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:18:00,948 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:18:01,074 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-08 10:18:01,074 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:18:01,084 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:18:01,087 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 10:18:01,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:18:01 BoogieIcfgContainer [2024-11-08 10:18:01,088 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:18:01,089 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:18:01,089 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:18:01,091 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:18:01,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:18:00" (1/3) ... [2024-11-08 10:18:01,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3374f63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:18:01, skipping insertion in model container [2024-11-08 10:18:01,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:18:00" (2/3) ... [2024-11-08 10:18:01,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3374f63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:18:01, skipping insertion in model container [2024-11-08 10:18:01,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:18:01" (3/3) ... [2024-11-08 10:18:01,093 INFO L112 eAbstractionObserver]: Analyzing ICFG s2if.c [2024-11-08 10:18:01,104 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:18:01,104 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:18:01,140 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:18:01,144 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;@21e51aa3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:18:01,145 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:18:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2024-11-08 10:18:01,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 10:18:01,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:01,153 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:01,153 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:01,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:01,157 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2024-11-08 10:18:01,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:01,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680168581] [2024-11-08 10:18:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:01,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:01,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:01,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680168581] [2024-11-08 10:18:01,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680168581] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:18:01,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:18:01,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 10:18:01,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205367693] [2024-11-08 10:18:01,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:18:01,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 10:18:01,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:01,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 10:18:01,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:18:01,306 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2024-11-08 10:18:01,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:01,317 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-11-08 10:18:01,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 10:18:01,319 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 [2024-11-08 10:18:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:01,323 INFO L225 Difference]: With dead ends: 34 [2024-11-08 10:18:01,324 INFO L226 Difference]: Without dead ends: 15 [2024-11-08 10:18:01,325 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 [2024-11-08 10:18:01,328 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:01,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:18:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-08 10:18:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-08 10:18:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2024-11-08 10:18:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-08 10:18:01,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2024-11-08 10:18:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:01,352 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-08 10:18:01,352 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) [2024-11-08 10:18:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-08 10:18:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 10:18:01,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:01,352 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:01,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:18:01,353 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:01,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2024-11-08 10:18:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741752003] [2024-11-08 10:18:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:01,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741752003] [2024-11-08 10:18:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741752003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:18:01,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:18:01,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:18:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448419205] [2024-11-08 10:18:01,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:18:01,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:18:01,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:01,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:18:01,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:18:01,465 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2024-11-08 10:18:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:01,519 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-11-08 10:18:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:18:01,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2024-11-08 10:18:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:01,520 INFO L225 Difference]: With dead ends: 28 [2024-11-08 10:18:01,521 INFO L226 Difference]: Without dead ends: 20 [2024-11-08 10:18:01,521 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:18:01,522 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:01,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 10 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:18:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-08 10:18:01,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2024-11-08 10:18:01,532 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) [2024-11-08 10:18:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-08 10:18:01,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2024-11-08 10:18:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:01,533 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-08 10:18:01,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2024-11-08 10:18:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-08 10:18:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 10:18:01,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:01,534 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:01,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 10:18:01,535 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:01,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:01,536 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2024-11-08 10:18:01,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:01,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424221797] [2024-11-08 10:18:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:01,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:02,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:02,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424221797] [2024-11-08 10:18:02,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424221797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:02,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642508867] [2024-11-08 10:18:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:02,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:02,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:02,032 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) [2024-11-08 10:18:02,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 10:18:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:02,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 10:18:02,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:02,148 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 [2024-11-08 10:18:02,253 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 19 treesize of output 11 [2024-11-08 10:18:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:02,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:02,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642508867] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:02,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:02,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-11-08 10:18:02,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517281084] [2024-11-08 10:18:02,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:02,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 10:18:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:02,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 10:18:02,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-08 10:18:02,393 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2024-11-08 10:18:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:02,592 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-11-08 10:18:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 10:18:02,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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 16 [2024-11-08 10:18:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:02,593 INFO L225 Difference]: With dead ends: 36 [2024-11-08 10:18:02,593 INFO L226 Difference]: Without dead ends: 32 [2024-11-08 10:18:02,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2024-11-08 10:18:02,596 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:02,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-08 10:18:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2024-11-08 10:18:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-08 10:18:02,601 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2024-11-08 10:18:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:02,602 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-08 10:18:02,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2024-11-08 10:18:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-08 10:18:02,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 10:18:02,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:02,604 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:02,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:02,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:02,807 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:02,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:02,809 INFO L85 PathProgramCache]: Analyzing trace with hash 680869797, now seen corresponding path program 1 times [2024-11-08 10:18:02,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:02,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507132827] [2024-11-08 10:18:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:02,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:02,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:02,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507132827] [2024-11-08 10:18:02,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507132827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:02,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462726789] [2024-11-08 10:18:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:02,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:02,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:02,973 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) [2024-11-08 10:18:02,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 10:18:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:03,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 10:18:03,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:03,037 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 [2024-11-08 10:18:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:03,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:03,083 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 14 treesize of output 12 [2024-11-08 10:18:03,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-08 10:18:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:03,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462726789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:03,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:03,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-08 10:18:03,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266495010] [2024-11-08 10:18:03,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:03,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 10:18:03,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 10:18:03,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-08 10:18:03,100 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2024-11-08 10:18:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:03,153 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-11-08 10:18:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 10:18:03,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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 [2024-11-08 10:18:03,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:03,154 INFO L225 Difference]: With dead ends: 38 [2024-11-08 10:18:03,154 INFO L226 Difference]: Without dead ends: 26 [2024-11-08 10:18:03,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:18:03,155 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:03,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 42 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:18:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-08 10:18:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-11-08 10:18:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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) [2024-11-08 10:18:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-08 10:18:03,160 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2024-11-08 10:18:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:03,160 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-08 10:18:03,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2024-11-08 10:18:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-08 10:18:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 10:18:03,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:03,161 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:03,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 10:18:03,361 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 [2024-11-08 10:18:03,362 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:03,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:03,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2024-11-08 10:18:03,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:03,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904384591] [2024-11-08 10:18:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:03,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:03,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:03,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904384591] [2024-11-08 10:18:03,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904384591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:03,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611476020] [2024-11-08 10:18:03,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:18:03,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:03,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:03,422 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) [2024-11-08 10:18:03,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 10:18:03,473 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:18:03,473 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:03,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:18:03,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:03,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:03,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611476020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:03,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:03,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-08 10:18:03,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822484542] [2024-11-08 10:18:03,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:03,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 10:18:03,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 10:18:03,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:18:03,554 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:03,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:03,639 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-08 10:18:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 10:18:03,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-08 10:18:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:03,640 INFO L225 Difference]: With dead ends: 33 [2024-11-08 10:18:03,640 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 10:18:03,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-08 10:18:03,641 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:03,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:03,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 10:18:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2024-11-08 10:18:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-08 10:18:03,648 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2024-11-08 10:18:03,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:03,649 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-08 10:18:03,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:03,650 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-08 10:18:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-08 10:18:03,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:03,650 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:03,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 10:18:03,850 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 [2024-11-08 10:18:03,851 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:03,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2024-11-08 10:18:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:03,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804371524] [2024-11-08 10:18:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:03,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:03,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804371524] [2024-11-08 10:18:03,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804371524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138627778] [2024-11-08 10:18:03,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:18:03,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:03,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:03,912 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) [2024-11-08 10:18:03,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 10:18:03,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 10:18:03,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:03,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:18:03,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:04,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:04,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138627778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:04,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:04,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-08 10:18:04,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343708837] [2024-11-08 10:18:04,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:04,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 10:18:04,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:04,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 10:18:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:18:04,043 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-11-08 10:18:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:04,106 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-08 10:18:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 10:18:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 [2024-11-08 10:18:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:04,107 INFO L225 Difference]: With dead ends: 37 [2024-11-08 10:18:04,107 INFO L226 Difference]: Without dead ends: 25 [2024-11-08 10:18:04,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:18:04,108 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:04,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 41 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:04,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-08 10:18:04,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2024-11-08 10:18:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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) [2024-11-08 10:18:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-11-08 10:18:04,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2024-11-08 10:18:04,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:04,111 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-11-08 10:18:04,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-11-08 10:18:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-11-08 10:18:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 10:18:04,112 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:04,112 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:04,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 10:18:04,315 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 [2024-11-08 10:18:04,315 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:04,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2024-11-08 10:18:04,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:04,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260632317] [2024-11-08 10:18:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:04,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:04,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:04,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260632317] [2024-11-08 10:18:04,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260632317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:04,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351109189] [2024-11-08 10:18:04,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:18:04,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:04,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:04,652 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) [2024-11-08 10:18:04,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 10:18:04,704 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:18:04,704 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:04,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-08 10:18:04,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:04,715 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 [2024-11-08 10:18:04,837 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 19 treesize of output 11 [2024-11-08 10:18:04,989 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 19 treesize of output 11 [2024-11-08 10:18:05,001 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-08 10:18:05,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2024-11-08 10:18:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:05,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:05,238 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-08 10:18:05,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-11-08 10:18:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:05,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351109189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:05,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:05,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2024-11-08 10:18:05,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849161030] [2024-11-08 10:18:05,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:05,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-08 10:18:05,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:05,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-08 10:18:05,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 10:18:05,453 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 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) [2024-11-08 10:18:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:06,374 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-11-08 10:18:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 10:18:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 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 21 [2024-11-08 10:18:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:06,376 INFO L225 Difference]: With dead ends: 57 [2024-11-08 10:18:06,376 INFO L226 Difference]: Without dead ends: 47 [2024-11-08 10:18:06,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=2288, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 10:18:06,377 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:06,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 71 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 10:18:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-08 10:18:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2024-11-08 10:18:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 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) [2024-11-08 10:18:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2024-11-08 10:18:06,383 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2024-11-08 10:18:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:06,383 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2024-11-08 10:18:06,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 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) [2024-11-08 10:18:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2024-11-08 10:18:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 10:18:06,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:06,384 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:06,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 10:18:06,588 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 [2024-11-08 10:18:06,589 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:06,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2024-11-08 10:18:06,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:06,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721353490] [2024-11-08 10:18:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:06,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:06,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:06,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721353490] [2024-11-08 10:18:06,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721353490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:06,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198050275] [2024-11-08 10:18:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:06,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:06,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:06,748 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) [2024-11-08 10:18:06,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 10:18:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:06,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 10:18:06,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:06,818 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 [2024-11-08 10:18:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:06,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:06,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 10:18:06,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 10:18:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:06,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198050275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:06,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:06,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-08 10:18:06,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490922528] [2024-11-08 10:18:06,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:06,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:18:06,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:06,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:18:06,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:18:06,906 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2024-11-08 10:18:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:06,980 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2024-11-08 10:18:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 10:18:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 21 [2024-11-08 10:18:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:06,981 INFO L225 Difference]: With dead ends: 62 [2024-11-08 10:18:06,981 INFO L226 Difference]: Without dead ends: 44 [2024-11-08 10:18:06,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:18:06,982 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:06,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 54 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:18:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-08 10:18:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-08 10:18:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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) [2024-11-08 10:18:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2024-11-08 10:18:06,989 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2024-11-08 10:18:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:06,989 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2024-11-08 10:18:06,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2024-11-08 10:18:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2024-11-08 10:18:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-08 10:18:06,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:06,989 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:07,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:07,190 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 [2024-11-08 10:18:07,191 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:07,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2024-11-08 10:18:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:07,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335818132] [2024-11-08 10:18:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:07,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:07,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335818132] [2024-11-08 10:18:07,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335818132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:07,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195474656] [2024-11-08 10:18:07,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:18:07,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:07,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:07,262 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) [2024-11-08 10:18:07,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 10:18:07,318 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 10:18:07,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:07,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:18:07,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:07,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:07,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195474656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:07,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:07,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 10:18:07,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82685822] [2024-11-08 10:18:07,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:07,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:18:07,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:07,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:18:07,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:18:07,417 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2024-11-08 10:18:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:07,546 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-11-08 10:18:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 10:18:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-08 10:18:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:07,547 INFO L225 Difference]: With dead ends: 52 [2024-11-08 10:18:07,547 INFO L226 Difference]: Without dead ends: 48 [2024-11-08 10:18:07,548 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:18:07,551 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:07,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-08 10:18:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2024-11-08 10:18:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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) [2024-11-08 10:18:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2024-11-08 10:18:07,557 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2024-11-08 10:18:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:07,557 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2024-11-08 10:18:07,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2024-11-08 10:18:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2024-11-08 10:18:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 10:18:07,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:07,558 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:07,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 10:18:07,758 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 [2024-11-08 10:18:07,759 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:07,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:07,759 INFO L85 PathProgramCache]: Analyzing trace with hash -981578845, now seen corresponding path program 2 times [2024-11-08 10:18:07,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:07,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401151695] [2024-11-08 10:18:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:07,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:07,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:07,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401151695] [2024-11-08 10:18:07,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401151695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:07,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585819742] [2024-11-08 10:18:07,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:18:07,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:07,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:07,846 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) [2024-11-08 10:18:07,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 10:18:07,902 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:18:07,902 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:07,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:18:07,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:07,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:07,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585819742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:07,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:07,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 10:18:07,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403954012] [2024-11-08 10:18:07,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:07,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:18:07,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:07,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:18:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:18:07,994 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2024-11-08 10:18:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:08,052 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-11-08 10:18:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 10:18:08,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) Word has length 24 [2024-11-08 10:18:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:08,053 INFO L225 Difference]: With dead ends: 56 [2024-11-08 10:18:08,053 INFO L226 Difference]: Without dead ends: 30 [2024-11-08 10:18:08,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-08 10:18:08,054 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:08,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:18:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-08 10:18:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-11-08 10:18:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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) [2024-11-08 10:18:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-08 10:18:08,059 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2024-11-08 10:18:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:08,060 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-08 10:18:08,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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) [2024-11-08 10:18:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-08 10:18:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 10:18:08,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:08,062 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:08,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:08,266 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 [2024-11-08 10:18:08,267 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:08,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 6 times [2024-11-08 10:18:08,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:08,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011163666] [2024-11-08 10:18:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:08,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011163666] [2024-11-08 10:18:08,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011163666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368805970] [2024-11-08 10:18:08,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:18:08,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:08,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:08,670 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) [2024-11-08 10:18:08,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 10:18:08,728 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-08 10:18:08,728 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:08,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 10:18:08,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:08,736 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 [2024-11-08 10:18:08,775 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 19 treesize of output 11 [2024-11-08 10:18:08,843 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 19 treesize of output 11 [2024-11-08 10:18:08,935 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 19 treesize of output 11 [2024-11-08 10:18:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:09,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:09,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:09,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 13 [2024-11-08 10:18:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:09,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368805970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:09,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:09,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 40 [2024-11-08 10:18:09,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049838088] [2024-11-08 10:18:09,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:09,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-08 10:18:09,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-08 10:18:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 10:18:09,408 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 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) [2024-11-08 10:18:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:10,224 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2024-11-08 10:18:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-08 10:18:10,225 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 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 26 [2024-11-08 10:18:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:10,225 INFO L225 Difference]: With dead ends: 59 [2024-11-08 10:18:10,225 INFO L226 Difference]: Without dead ends: 47 [2024-11-08 10:18:10,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=454, Invalid=3968, Unknown=0, NotChecked=0, Total=4422 [2024-11-08 10:18:10,228 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:10,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 88 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:18:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-08 10:18:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2024-11-08 10:18:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 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) [2024-11-08 10:18:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-08 10:18:10,232 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2024-11-08 10:18:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:10,233 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-08 10:18:10,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 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) [2024-11-08 10:18:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-08 10:18:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 10:18:10,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:10,234 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:10,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 10:18:10,434 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 [2024-11-08 10:18:10,434 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:10,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:10,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 3 times [2024-11-08 10:18:10,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:10,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162022535] [2024-11-08 10:18:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:10,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:10,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162022535] [2024-11-08 10:18:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162022535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576933487] [2024-11-08 10:18:10,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:18:10,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:10,699 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) [2024-11-08 10:18:10,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 10:18:10,760 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 10:18:10,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:10,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-08 10:18:10,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:10,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 10:18:10,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:10,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-11-08 10:18:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:10,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:10,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576933487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:10,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:10,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 20 [2024-11-08 10:18:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604457860] [2024-11-08 10:18:10,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:10,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 10:18:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 10:18:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:18:10,945 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) [2024-11-08 10:18:11,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:11,289 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2024-11-08 10:18:11,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 10:18:11,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) Word has length 26 [2024-11-08 10:18:11,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:11,290 INFO L225 Difference]: With dead ends: 47 [2024-11-08 10:18:11,290 INFO L226 Difference]: Without dead ends: 43 [2024-11-08 10:18:11,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 10:18:11,290 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:11,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-08 10:18:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-11-08 10:18:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 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) [2024-11-08 10:18:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-11-08 10:18:11,296 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 26 [2024-11-08 10:18:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:11,297 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-11-08 10:18:11,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 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) [2024-11-08 10:18:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-11-08 10:18:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 10:18:11,297 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:11,298 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:11,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 10:18:11,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 10:18:11,498 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:11,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:11,498 INFO L85 PathProgramCache]: Analyzing trace with hash -798779835, now seen corresponding path program 4 times [2024-11-08 10:18:11,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:11,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806914704] [2024-11-08 10:18:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:11,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:11,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:11,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806914704] [2024-11-08 10:18:11,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806914704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:11,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845141156] [2024-11-08 10:18:11,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:18:11,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:11,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:11,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:11,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 10:18:11,667 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:18:11,667 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:11,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 10:18:11,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:11,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 10:18:11,696 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 28 treesize of output 27 [2024-11-08 10:18:11,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:11,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2024-11-08 10:18:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 10:18:11,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 10:18:12,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845141156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:12,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:12,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2024-11-08 10:18:12,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281035561] [2024-11-08 10:18:12,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:12,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 10:18:12,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 10:18:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2024-11-08 10:18:12,013 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 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) [2024-11-08 10:18:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:13,098 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-11-08 10:18:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-08 10:18:13,098 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 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 29 [2024-11-08 10:18:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:13,099 INFO L225 Difference]: With dead ends: 66 [2024-11-08 10:18:13,099 INFO L226 Difference]: Without dead ends: 48 [2024-11-08 10:18:13,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=768, Invalid=3522, Unknown=0, NotChecked=0, Total=4290 [2024-11-08 10:18:13,100 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:13,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 56 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:18:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-08 10:18:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2024-11-08 10:18:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 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) [2024-11-08 10:18:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-08 10:18:13,106 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 29 [2024-11-08 10:18:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:13,106 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-08 10:18:13,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 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) [2024-11-08 10:18:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-08 10:18:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 10:18:13,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:13,107 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:13,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:13,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 10:18:13,311 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:13,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:13,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1239650847, now seen corresponding path program 5 times [2024-11-08 10:18:13,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:13,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225053418] [2024-11-08 10:18:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:13,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225053418] [2024-11-08 10:18:13,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225053418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398028414] [2024-11-08 10:18:13,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:18:13,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:13,430 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:13,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 10:18:13,533 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 10:18:13,533 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:13,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 10:18:13,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:13,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398028414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:13,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:13,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-08 10:18:13,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394488936] [2024-11-08 10:18:13,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:13,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 10:18:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:13,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 10:18:13,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:18:13,709 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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) [2024-11-08 10:18:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:13,813 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2024-11-08 10:18:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 10:18:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 34 [2024-11-08 10:18:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:13,814 INFO L225 Difference]: With dead ends: 96 [2024-11-08 10:18:13,814 INFO L226 Difference]: Without dead ends: 60 [2024-11-08 10:18:13,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-08 10:18:13,814 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:13,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:13,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-08 10:18:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2024-11-08 10:18:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 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) [2024-11-08 10:18:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-08 10:18:13,822 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 34 [2024-11-08 10:18:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:13,822 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-08 10:18:13,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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) [2024-11-08 10:18:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-08 10:18:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 10:18:13,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:13,823 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:13,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 10:18:14,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 10:18:14,023 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:14,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash -338157539, now seen corresponding path program 6 times [2024-11-08 10:18:14,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256808461] [2024-11-08 10:18:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:14,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:14,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256808461] [2024-11-08 10:18:14,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256808461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:14,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173965238] [2024-11-08 10:18:14,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:18:14,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:14,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:14,504 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:14,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 10:18:14,590 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-08 10:18:14,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:14,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-08 10:18:14,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:14,629 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 [2024-11-08 10:18:14,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:14,669 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 21 treesize of output 20 [2024-11-08 10:18:14,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:14,716 INFO L349 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2024-11-08 10:18:14,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2024-11-08 10:18:14,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:14,992 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-08 10:18:14,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2024-11-08 10:18:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 10:18:15,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:15,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 10:18:15,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 10:18:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:18:15,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173965238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:15,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:15,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 20] total 46 [2024-11-08 10:18:15,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661850811] [2024-11-08 10:18:15,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:15,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-08 10:18:15,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-08 10:18:15,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2024-11-08 10:18:15,559 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 46 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 46 states have internal predecessors, (86), 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) [2024-11-08 10:18:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:16,200 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-11-08 10:18:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 10:18:16,200 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 46 states have internal predecessors, (86), 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 36 [2024-11-08 10:18:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:16,201 INFO L225 Difference]: With dead ends: 59 [2024-11-08 10:18:16,201 INFO L226 Difference]: Without dead ends: 47 [2024-11-08 10:18:16,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=596, Invalid=3064, Unknown=0, NotChecked=0, Total=3660 [2024-11-08 10:18:16,202 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 110 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:16,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 67 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:18:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-08 10:18:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-11-08 10:18:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:18:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-11-08 10:18:16,208 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2024-11-08 10:18:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:16,209 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-11-08 10:18:16,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 46 states have internal predecessors, (86), 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) [2024-11-08 10:18:16,209 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-11-08 10:18:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 10:18:16,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:16,209 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:16,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 10:18:16,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 10:18:16,410 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:16,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash 724113925, now seen corresponding path program 7 times [2024-11-08 10:18:16,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:16,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792302205] [2024-11-08 10:18:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:16,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792302205] [2024-11-08 10:18:16,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792302205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28438993] [2024-11-08 10:18:16,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:18:16,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:16,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:16,550 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:16,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 10:18:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:16,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 10:18:16,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:16,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:16,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28438993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:16,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:16,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-08 10:18:16,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999712636] [2024-11-08 10:18:16,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:16,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 10:18:16,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:16,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 10:18:16,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-08 10:18:16,825 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 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) [2024-11-08 10:18:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:16,959 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2024-11-08 10:18:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 10:18:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 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 39 [2024-11-08 10:18:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:16,960 INFO L225 Difference]: With dead ends: 104 [2024-11-08 10:18:16,960 INFO L226 Difference]: Without dead ends: 65 [2024-11-08 10:18:16,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-11-08 10:18:16,961 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:16,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 38 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-08 10:18:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2024-11-08 10:18:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 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) [2024-11-08 10:18:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-11-08 10:18:16,970 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2024-11-08 10:18:16,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:16,970 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-11-08 10:18:16,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 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) [2024-11-08 10:18:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-11-08 10:18:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 10:18:16,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:16,973 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:16,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:17,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:17,173 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:17,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:17,174 INFO L85 PathProgramCache]: Analyzing trace with hash -294413625, now seen corresponding path program 8 times [2024-11-08 10:18:17,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:17,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048842762] [2024-11-08 10:18:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:17,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 50 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 10:18:17,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:17,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048842762] [2024-11-08 10:18:17,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048842762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:17,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144614678] [2024-11-08 10:18:17,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:18:17,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:17,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:17,478 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:17,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 10:18:17,553 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:18:17,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:17,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-08 10:18:17,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:17,578 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 [2024-11-08 10:18:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:17,586 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 21 treesize of output 20 [2024-11-08 10:18:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:17,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:17,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:17,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:17,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-08 10:18:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 50 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 10:18:25,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:26,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 10:18:26,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 10:18:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 10:18:26,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144614678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:26,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:26,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 32 [2024-11-08 10:18:26,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230118999] [2024-11-08 10:18:26,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:26,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 10:18:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 10:18:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=829, Unknown=2, NotChecked=0, Total=992 [2024-11-08 10:18:26,124 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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) [2024-11-08 10:18:30,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 10:18:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:30,471 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2024-11-08 10:18:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 10:18:30,475 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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 41 [2024-11-08 10:18:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:30,476 INFO L225 Difference]: With dead ends: 58 [2024-11-08 10:18:30,476 INFO L226 Difference]: Without dead ends: 46 [2024-11-08 10:18:30,478 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=221, Invalid=1259, Unknown=2, NotChecked=0, Total=1482 [2024-11-08 10:18:30,478 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:30,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 433 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-11-08 10:18:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-08 10:18:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-08 10:18:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 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) [2024-11-08 10:18:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-11-08 10:18:30,486 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 41 [2024-11-08 10:18:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:30,486 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-11-08 10:18:30,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 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) [2024-11-08 10:18:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-11-08 10:18:30,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 10:18:30,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:30,487 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:30,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:30,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 10:18:30,687 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:30,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1771002085, now seen corresponding path program 9 times [2024-11-08 10:18:30,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:30,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075318288] [2024-11-08 10:18:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:30,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:30,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075318288] [2024-11-08 10:18:30,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075318288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:30,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484741030] [2024-11-08 10:18:30,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:18:30,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:30,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:30,845 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:30,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 10:18:30,982 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-08 10:18:30,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:30,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 10:18:30,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:31,030 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 [2024-11-08 10:18:31,064 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 [2024-11-08 10:18:31,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:31,102 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 [2024-11-08 10:18:31,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:31,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 37 [2024-11-08 10:18:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-08 10:18:31,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-08 10:18:31,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484741030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:31,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:31,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 14] total 46 [2024-11-08 10:18:31,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435018674] [2024-11-08 10:18:31,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:31,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-08 10:18:31,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:31,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-08 10:18:31,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2024-11-08 10:18:31,657 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 46 states have internal predecessors, (96), 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) [2024-11-08 10:18:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:33,201 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2024-11-08 10:18:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-08 10:18:33,201 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 46 states have internal predecessors, (96), 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 44 [2024-11-08 10:18:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:33,202 INFO L225 Difference]: With dead ends: 124 [2024-11-08 10:18:33,202 INFO L226 Difference]: Without dead ends: 89 [2024-11-08 10:18:33,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5528 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1963, Invalid=13537, Unknown=0, NotChecked=0, Total=15500 [2024-11-08 10:18:33,205 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 128 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:33,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 70 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 10:18:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-08 10:18:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 50. [2024-11-08 10:18:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2024-11-08 10:18:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-11-08 10:18:33,221 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 44 [2024-11-08 10:18:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:33,221 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-11-08 10:18:33,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 46 states have internal predecessors, (96), 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) [2024-11-08 10:18:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-11-08 10:18:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 10:18:33,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:33,222 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:33,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:33,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 10:18:33,422 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:33,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:33,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1477938483, now seen corresponding path program 10 times [2024-11-08 10:18:33,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:33,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844938808] [2024-11-08 10:18:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:33,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:33,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844938808] [2024-11-08 10:18:33,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844938808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:33,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380265706] [2024-11-08 10:18:33,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:18:33,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:33,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:33,620 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:33,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 10:18:33,694 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:18:33,695 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:33,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 10:18:33,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:33,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 10:18:33,727 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 28 treesize of output 27 [2024-11-08 10:18:33,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:33,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2024-11-08 10:18:33,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:33,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2024-11-08 10:18:34,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:34,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 48 [2024-11-08 10:18:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 37 proven. 95 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:34,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 10:18:34,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380265706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:34,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:34,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 21] total 59 [2024-11-08 10:18:34,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872877699] [2024-11-08 10:18:34,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:34,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-08 10:18:34,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-08 10:18:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=2932, Unknown=0, NotChecked=0, Total=3422 [2024-11-08 10:18:34,733 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 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) [2024-11-08 10:18:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:50,686 INFO L93 Difference]: Finished difference Result 346 states and 421 transitions. [2024-11-08 10:18:50,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2024-11-08 10:18:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 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 49 [2024-11-08 10:18:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:50,690 INFO L225 Difference]: With dead ends: 346 [2024-11-08 10:18:50,690 INFO L226 Difference]: Without dead ends: 298 [2024-11-08 10:18:50,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38792 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=11085, Invalid=85947, Unknown=0, NotChecked=0, Total=97032 [2024-11-08 10:18:50,697 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 325 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:50,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 95 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-08 10:18:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-08 10:18:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 55. [2024-11-08 10:18:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 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) [2024-11-08 10:18:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-08 10:18:50,712 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 49 [2024-11-08 10:18:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:50,712 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-08 10:18:50,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 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) [2024-11-08 10:18:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-08 10:18:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 10:18:50,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:50,713 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:50,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 10:18:50,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:50,914 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:50,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1926978967, now seen corresponding path program 11 times [2024-11-08 10:18:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:50,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569355492] [2024-11-08 10:18:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:51,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569355492] [2024-11-08 10:18:51,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569355492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:51,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191538321] [2024-11-08 10:18:51,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:18:51,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:51,162 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:51,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 10:18:51,429 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-08 10:18:51,429 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:51,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 10:18:51,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:51,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:51,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191538321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:51,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:51,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2024-11-08 10:18:51,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947901941] [2024-11-08 10:18:51,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:51,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 10:18:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:51,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 10:18:51,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2024-11-08 10:18:51,725 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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) [2024-11-08 10:18:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:18:51,915 INFO L93 Difference]: Finished difference Result 182 states and 219 transitions. [2024-11-08 10:18:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 10:18:51,915 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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 54 [2024-11-08 10:18:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:18:51,916 INFO L225 Difference]: With dead ends: 182 [2024-11-08 10:18:51,916 INFO L226 Difference]: Without dead ends: 109 [2024-11-08 10:18:51,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 10:18:51,917 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:18:51,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 53 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:18:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-08 10:18:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 57. [2024-11-08 10:18:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 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) [2024-11-08 10:18:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-11-08 10:18:51,942 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 54 [2024-11-08 10:18:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:18:51,942 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-11-08 10:18:51,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 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) [2024-11-08 10:18:51,943 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-11-08 10:18:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 10:18:51,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:18:51,943 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:18:51,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-08 10:18:52,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:52,143 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:18:52,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:18:52,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1372258453, now seen corresponding path program 12 times [2024-11-08 10:18:52,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:18:52,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893638251] [2024-11-08 10:18:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:18:52,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:18:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:18:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 46 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:18:52,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:18:52,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893638251] [2024-11-08 10:18:52,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893638251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:18:52,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725599009] [2024-11-08 10:18:52,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:18:52,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:18:52,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:18:52,729 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:18:52,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 10:18:52,879 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-08 10:18:52,879 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:18:52,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-08 10:18:52,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:18:52,955 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 [2024-11-08 10:18:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:52,997 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 21 treesize of output 20 [2024-11-08 10:18:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:53,045 INFO L349 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2024-11-08 10:18:53,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2024-11-08 10:18:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:53,091 INFO L349 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2024-11-08 10:18:53,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2024-11-08 10:18:53,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:18:53,177 INFO L349 Elim1Store]: treesize reduction 52, result has 24.6 percent of original size [2024-11-08 10:18:53,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 46 [2024-11-08 10:18:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 74 proven. 96 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-08 10:18:53,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:18:58,622 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 53 treesize of output 49 [2024-11-08 10:18:58,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:18:58,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 52 [2024-11-08 10:18:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 42 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:18:58,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725599009] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:18:58,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:18:58,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 31] total 72 [2024-11-08 10:18:58,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092219830] [2024-11-08 10:18:58,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:18:58,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-08 10:18:58,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:18:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-08 10:18:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=4481, Unknown=2, NotChecked=0, Total=5112 [2024-11-08 10:18:58,746 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 72 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 72 states have internal predecessors, (136), 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) [2024-11-08 10:19:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:19:00,468 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2024-11-08 10:19:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 10:19:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 72 states have internal predecessors, (136), 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 56 [2024-11-08 10:19:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:19:00,469 INFO L225 Difference]: With dead ends: 104 [2024-11-08 10:19:00,469 INFO L226 Difference]: Without dead ends: 86 [2024-11-08 10:19:00,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3184 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1348, Invalid=8352, Unknown=2, NotChecked=0, Total=9702 [2024-11-08 10:19:00,470 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 151 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 10:19:00,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 87 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 10:19:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-08 10:19:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2024-11-08 10:19:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 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) [2024-11-08 10:19:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-11-08 10:19:00,503 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 56 [2024-11-08 10:19:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:19:00,503 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-11-08 10:19:00,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 72 states have internal predecessors, (136), 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) [2024-11-08 10:19:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-11-08 10:19:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-08 10:19:00,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:19:00,504 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:19:00,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-08 10:19:00,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:00,705 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:00,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 575023501, now seen corresponding path program 13 times [2024-11-08 10:19:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167205916] [2024-11-08 10:19:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 120 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:19:00,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:00,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167205916] [2024-11-08 10:19:00,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167205916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:00,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880181838] [2024-11-08 10:19:00,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:19:00,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:00,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:00,981 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:00,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 10:19:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:01,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 10:19:01,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:19:01,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:19:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:19:01,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880181838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:19:01,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:19:01,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-11-08 10:19:01,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588857229] [2024-11-08 10:19:01,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:19:01,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-08 10:19:01,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:19:01,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-08 10:19:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 10:19:01,429 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 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) [2024-11-08 10:19:01,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:19:01,706 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2024-11-08 10:19:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 10:19:01,707 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 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 59 [2024-11-08 10:19:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:19:01,708 INFO L225 Difference]: With dead ends: 190 [2024-11-08 10:19:01,708 INFO L226 Difference]: Without dead ends: 114 [2024-11-08 10:19:01,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 87 SyntacticMatches, 19 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=471, Invalid=1421, Unknown=0, NotChecked=0, Total=1892 [2024-11-08 10:19:01,709 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:19:01,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 32 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:19:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-08 10:19:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2024-11-08 10:19:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 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) [2024-11-08 10:19:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2024-11-08 10:19:01,733 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 59 [2024-11-08 10:19:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:19:01,733 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2024-11-08 10:19:01,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 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) [2024-11-08 10:19:01,734 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2024-11-08 10:19:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-08 10:19:01,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:19:01,734 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:19:01,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 10:19:01,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-08 10:19:01,935 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:01,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:01,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1664791887, now seen corresponding path program 14 times [2024-11-08 10:19:01,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:01,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976257180] [2024-11-08 10:19:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:01,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 61 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:19:02,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:02,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976257180] [2024-11-08 10:19:02,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976257180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:02,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40189087] [2024-11-08 10:19:02,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:19:02,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:02,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:02,544 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:02,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 10:19:02,633 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:19:02,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:19:02,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-08 10:19:02,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:02,744 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 [2024-11-08 10:19:02,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,787 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 21 treesize of output 20 [2024-11-08 10:19:02,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:02,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-08 10:19:02,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:02,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:02,956 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 39 treesize of output 44 [2024-11-08 10:19:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:19:03,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:03,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-08 10:19:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 88 proven. 131 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-08 10:19:17,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:19:17,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 10:19:17,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 10:19:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 83 proven. 120 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-08 10:19:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40189087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:19:17,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:19:17,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 17] total 62 [2024-11-08 10:19:17,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864249134] [2024-11-08 10:19:17,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:19:17,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-08 10:19:17,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:19:17,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-08 10:19:17,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3345, Unknown=6, NotChecked=0, Total=3782 [2024-11-08 10:19:17,952 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 62 states have internal predecessors, (136), 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) [2024-11-08 10:19:28,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 10:19:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:19:32,209 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2024-11-08 10:19:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 10:19:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 62 states have internal predecessors, (136), 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 61 [2024-11-08 10:19:32,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:19:32,210 INFO L225 Difference]: With dead ends: 109 [2024-11-08 10:19:32,210 INFO L226 Difference]: Without dead ends: 91 [2024-11-08 10:19:32,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=875, Invalid=6424, Unknown=11, NotChecked=0, Total=7310 [2024-11-08 10:19:32,210 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 138 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 39 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:19:32,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 95 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1250 Invalid, 8 Unknown, 0 Unchecked, 7.4s Time] [2024-11-08 10:19:32,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-08 10:19:32,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2024-11-08 10:19:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 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) [2024-11-08 10:19:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2024-11-08 10:19:32,232 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 61 [2024-11-08 10:19:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:19:32,232 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2024-11-08 10:19:32,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 62 states have internal predecessors, (136), 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) [2024-11-08 10:19:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2024-11-08 10:19:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-08 10:19:32,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:19:32,233 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:19:32,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-08 10:19:32,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-08 10:19:32,433 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:19:32,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:19:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash 949912211, now seen corresponding path program 15 times [2024-11-08 10:19:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:19:32,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220066214] [2024-11-08 10:19:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:19:32,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:19:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:19:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 148 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:19:32,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:19:32,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220066214] [2024-11-08 10:19:32,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220066214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:19:32,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493751354] [2024-11-08 10:19:32,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:19:32,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:19:32,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:19:32,754 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:19:32,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 10:19:33,547 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-08 10:19:33,547 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:19:33,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-08 10:19:33,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:19:33,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 10:19:33,583 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 28 treesize of output 27 [2024-11-08 10:19:33,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:33,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2024-11-08 10:19:33,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:33,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2024-11-08 10:19:33,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:33,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 72 [2024-11-08 10:19:34,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:19:34,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 69 [2024-11-08 10:19:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 71 proven. 129 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-08 10:19:34,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:19:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 55 proven. 145 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-08 10:19:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493751354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:19:34,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:19:34,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 18] total 56 [2024-11-08 10:19:34,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869767221] [2024-11-08 10:19:34,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:19:34,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-08 10:19:34,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:19:34,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-08 10:19:34,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2762, Unknown=0, NotChecked=0, Total=3080 [2024-11-08 10:19:34,653 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 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)