./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s22if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s22if.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 0a4adccbfdb287a751e5c33c3e59569f71741de562bf1a42797adb485c4a44d2 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 17:09:18,006 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 17:09:18,076 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 17:09:18,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 17:09:18,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 17:09:18,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 17:09:18,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 17:09:18,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 17:09:18,114 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 17:09:18,115 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 17:09:18,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 17:09:18,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 17:09:18,116 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 17:09:18,118 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 17:09:18,118 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 17:09:18,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 17:09:18,119 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 17:09:18,119 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 17:09:18,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 17:09:18,120 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 17:09:18,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 17:09:18,121 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 17:09:18,121 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 17:09:18,122 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 17:09:18,122 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 17:09:18,122 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 17:09:18,122 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 17:09:18,123 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 17:09:18,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 17:09:18,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 17:09:18,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 17:09:18,124 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 17:09:18,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 17:09:18,124 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 17:09:18,125 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 17:09:18,125 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 17:09:18,125 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 17:09:18,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 17:09:18,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 17:09:18,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 17:09:18,126 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 17:09:18,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 17:09:18,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a4adccbfdb287a751e5c33c3e59569f71741de562bf1a42797adb485c4a44d2 [2024-11-19 17:09:18,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 17:09:18,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 17:09:18,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 17:09:18,442 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 17:09:18,442 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 17:09:18,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s22if.c [2024-11-19 17:09:19,879 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 17:09:20,114 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 17:09:20,114 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s22if.c [2024-11-19 17:09:20,121 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19fa3b3f6/f9145d5552524c1bb007003180d0abf5/FLAGac2a51203 [2024-11-19 17:09:20,476 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19fa3b3f6/f9145d5552524c1bb007003180d0abf5 [2024-11-19 17:09:20,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 17:09:20,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 17:09:20,480 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 17:09:20,480 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 17:09:20,487 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 17:09:20,488 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1974a830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20, skipping insertion in model container [2024-11-19 17:09:20,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,511 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 17:09:20,666 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/s22if.c[588,601] [2024-11-19 17:09:20,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 17:09:20,695 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 17:09:20,707 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/s22if.c[588,601] [2024-11-19 17:09:20,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 17:09:20,734 INFO L204 MainTranslator]: Completed translation [2024-11-19 17:09:20,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20 WrapperNode [2024-11-19 17:09:20,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 17:09:20,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 17:09:20,735 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 17:09:20,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 17:09:20,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,767 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2024-11-19 17:09:20,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 17:09:20,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 17:09:20,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 17:09:20,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 17:09:20,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,782 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,796 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 8, 9, 6]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 3, 3]. [2024-11-19 17:09:20,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,810 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 17:09:20,822 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 17:09:20,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 17:09:20,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 17:09:20,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (1/1) ... [2024-11-19 17:09:20,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 17:09:20,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:20,855 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) [2024-11-19 17:09:20,857 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 [2024-11-19 17:09:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 17:09:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 17:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 17:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 17:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 17:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 17:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 17:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 17:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 17:09:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 17:09:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 17:09:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 17:09:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 17:09:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 17:09:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 17:09:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 17:09:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 17:09:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 17:09:20,988 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 17:09:20,990 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 17:09:21,177 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-19 17:09:21,177 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 17:09:21,189 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 17:09:21,189 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 17:09:21,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:09:21 BoogieIcfgContainer [2024-11-19 17:09:21,190 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 17:09:21,192 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 17:09:21,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 17:09:21,194 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 17:09:21,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:09:20" (1/3) ... [2024-11-19 17:09:21,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408f552f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:09:21, skipping insertion in model container [2024-11-19 17:09:21,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:20" (2/3) ... [2024-11-19 17:09:21,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@408f552f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:09:21, skipping insertion in model container [2024-11-19 17:09:21,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:09:21" (3/3) ... [2024-11-19 17:09:21,197 INFO L112 eAbstractionObserver]: Analyzing ICFG s22if.c [2024-11-19 17:09:21,210 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 17:09:21,210 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 17:09:21,259 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 17:09:21,264 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;@269dd9a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 17:09:21,265 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 17:09:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) [2024-11-19 17:09:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 17:09:21,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:21,274 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:21,275 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:21,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2024-11-19 17:09:21,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:21,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344859777] [2024-11-19 17:09:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:21,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:21,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344859777] [2024-11-19 17:09:21,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344859777] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:09:21,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:09:21,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 17:09:21,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938657812] [2024-11-19 17:09:21,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:09:21,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 17:09:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 17:09:21,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 17:09:21,480 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2024-11-19 17:09:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:21,491 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2024-11-19 17:09:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 17:09:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-19 17:09:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:21,499 INFO L225 Difference]: With dead ends: 42 [2024-11-19 17:09:21,499 INFO L226 Difference]: Without dead ends: 19 [2024-11-19 17:09:21,501 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 [2024-11-19 17:09:21,504 INFO L432 NwaCegarLoop]: 28 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, 28 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 [2024-11-19 17:09:21,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 17:09:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-19 17:09:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-19 17:09:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2024-11-19 17:09:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-19 17:09:21,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2024-11-19 17:09:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:21,532 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-19 17:09:21,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2024-11-19 17:09:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-19 17:09:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 17:09:21,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:21,534 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:21,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 17:09:21,535 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:21,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2024-11-19 17:09:21,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:21,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139978909] [2024-11-19 17:09:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:21,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:21,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:21,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139978909] [2024-11-19 17:09:21,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139978909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 17:09:21,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 17:09:21,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 17:09:21,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407150939] [2024-11-19 17:09:21,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 17:09:21,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 17:09:21,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:21,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 17:09:21,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 17:09:21,741 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-11-19 17:09:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:21,824 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2024-11-19 17:09:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 17:09:21,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-19 17:09:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:21,827 INFO L225 Difference]: With dead ends: 39 [2024-11-19 17:09:21,828 INFO L226 Difference]: Without dead ends: 27 [2024-11-19 17:09:21,828 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 [2024-11-19 17:09:21,829 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:21,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 11 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:21,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-19 17:09:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2024-11-19 17:09:21,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2024-11-19 17:09:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-19 17:09:21,841 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2024-11-19 17:09:21,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:21,841 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-19 17:09:21,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-11-19 17:09:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-19 17:09:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-19 17:09:21,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:21,844 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:21,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 17:09:21,845 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:21,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:21,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2024-11-19 17:09:21,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:21,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000859314] [2024-11-19 17:09:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:21,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:22,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000859314] [2024-11-19 17:09:22,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000859314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:22,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445789821] [2024-11-19 17:09:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:22,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:22,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:22,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:09:22,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 17:09:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:22,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 17:09:22,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:22,755 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 [2024-11-19 17:09:22,917 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 [2024-11-19 17:09:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:22,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:23,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445789821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:23,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:23,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-19 17:09:23,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010348267] [2024-11-19 17:09:23,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:23,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 17:09:23,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:23,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 17:09:23,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-11-19 17:09:23,152 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2024-11-19 17:09:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:23,490 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-11-19 17:09:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 17:09:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 [2024-11-19 17:09:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:23,493 INFO L225 Difference]: With dead ends: 44 [2024-11-19 17:09:23,494 INFO L226 Difference]: Without dead ends: 40 [2024-11-19 17:09:23,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2024-11-19 17:09:23,495 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:23,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 52 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:09:23,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-19 17:09:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2024-11-19 17:09:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 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) [2024-11-19 17:09:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-11-19 17:09:23,505 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 21 [2024-11-19 17:09:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:23,505 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-11-19 17:09:23,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2024-11-19 17:09:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-11-19 17:09:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-19 17:09:23,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:23,507 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:23,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:23,710 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 [2024-11-19 17:09:23,711 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:23,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:23,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2024-11-19 17:09:23,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:23,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694367963] [2024-11-19 17:09:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:23,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:24,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:24,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694367963] [2024-11-19 17:09:24,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694367963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:24,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059744302] [2024-11-19 17:09:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:24,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:24,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:24,056 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) [2024-11-19 17:09:24,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 17:09:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:24,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 17:09:24,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:24,185 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 [2024-11-19 17:09:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:24,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:24,280 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 27 treesize of output 23 [2024-11-19 17:09:24,291 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 17:09:24,291 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 24 treesize of output 16 [2024-11-19 17:09:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:24,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059744302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:24,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:24,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2024-11-19 17:09:24,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123784965] [2024-11-19 17:09:24,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:24,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 17:09:24,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 17:09:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-19 17:09:24,306 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2024-11-19 17:09:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:24,533 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2024-11-19 17:09:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 17:09:24,534 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 21 [2024-11-19 17:09:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:24,535 INFO L225 Difference]: With dead ends: 86 [2024-11-19 17:09:24,535 INFO L226 Difference]: Without dead ends: 74 [2024-11-19 17:09:24,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-19 17:09:24,536 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:24,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 114 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:09:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-19 17:09:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2024-11-19 17:09:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 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) [2024-11-19 17:09:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2024-11-19 17:09:24,553 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 21 [2024-11-19 17:09:24,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:24,554 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2024-11-19 17:09:24,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2024-11-19 17:09:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2024-11-19 17:09:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-19 17:09:24,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:24,555 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:24,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 17:09:24,756 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 [2024-11-19 17:09:24,757 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:24,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1592625659, now seen corresponding path program 1 times [2024-11-19 17:09:24,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:24,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821656186] [2024-11-19 17:09:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:24,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:24,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:24,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821656186] [2024-11-19 17:09:24,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821656186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:24,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732912133] [2024-11-19 17:09:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:24,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:24,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:24,988 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) [2024-11-19 17:09:24,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 17:09:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:25,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 17:09:25,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:25,059 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 [2024-11-19 17:09:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:25,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:25,113 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 [2024-11-19 17:09:25,117 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 [2024-11-19 17:09:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:25,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732912133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:25,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:25,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-19 17:09:25,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051510855] [2024-11-19 17:09:25,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:25,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 17:09:25,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:25,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 17:09:25,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 17:09:25,130 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2024-11-19 17:09:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:25,221 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2024-11-19 17:09:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 17:09:25,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 21 [2024-11-19 17:09:25,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:25,223 INFO L225 Difference]: With dead ends: 78 [2024-11-19 17:09:25,223 INFO L226 Difference]: Without dead ends: 57 [2024-11-19 17:09:25,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-19 17:09:25,224 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:25,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-19 17:09:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2024-11-19 17:09:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 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) [2024-11-19 17:09:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2024-11-19 17:09:25,239 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 21 [2024-11-19 17:09:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:25,240 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2024-11-19 17:09:25,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2024-11-19 17:09:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2024-11-19 17:09:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-19 17:09:25,240 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:25,241 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:25,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:25,441 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 [2024-11-19 17:09:25,442 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:25,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2024-11-19 17:09:25,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:25,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159912353] [2024-11-19 17:09:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:25,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:25,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:25,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159912353] [2024-11-19 17:09:25,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159912353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:25,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106697532] [2024-11-19 17:09:25,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:09:25,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:25,531 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) [2024-11-19 17:09:25,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 17:09:25,598 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:09:25,598 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:25,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 17:09:25,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:25,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:25,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106697532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:25,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:25,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 17:09:25,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522579663] [2024-11-19 17:09:25,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:25,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 17:09:25,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:25,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 17:09:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 17:09:25,720 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) [2024-11-19 17:09:25,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:25,906 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-11-19 17:09:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 17:09:25,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) Word has length 23 [2024-11-19 17:09:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:25,910 INFO L225 Difference]: With dead ends: 85 [2024-11-19 17:09:25,910 INFO L226 Difference]: Without dead ends: 75 [2024-11-19 17:09:25,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-19 17:09:25,911 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:25,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 38 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-19 17:09:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 53. [2024-11-19 17:09:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 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) [2024-11-19 17:09:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-11-19 17:09:25,929 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 23 [2024-11-19 17:09:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:25,930 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-11-19 17:09:25,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 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) [2024-11-19 17:09:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-11-19 17:09:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-19 17:09:25,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:25,931 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:25,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 17:09:26,131 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 [2024-11-19 17:09:26,132 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:26,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2024-11-19 17:09:26,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:26,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342931694] [2024-11-19 17:09:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:26,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:26,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:26,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342931694] [2024-11-19 17:09:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342931694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:26,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644848662] [2024-11-19 17:09:26,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:09:26,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:26,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:26,216 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) [2024-11-19 17:09:26,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 17:09:26,283 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 17:09:26,283 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:26,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 17:09:26,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:26,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 17:09:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644848662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:26,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:26,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 17:09:26,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224217137] [2024-11-19 17:09:26,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:26,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 17:09:26,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:26,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 17:09:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 17:09:26,415 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2024-11-19 17:09:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:26,536 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2024-11-19 17:09:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 17:09:26,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 24 [2024-11-19 17:09:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:26,538 INFO L225 Difference]: With dead ends: 78 [2024-11-19 17:09:26,538 INFO L226 Difference]: Without dead ends: 42 [2024-11-19 17:09:26,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-19 17:09:26,539 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:26,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 43 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-19 17:09:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2024-11-19 17:09:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 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) [2024-11-19 17:09:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-19 17:09:26,552 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2024-11-19 17:09:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:26,552 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-19 17:09:26,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2024-11-19 17:09:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-19 17:09:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 17:09:26,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:26,555 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:26,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 17:09:26,755 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 [2024-11-19 17:09:26,756 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:26,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2024-11-19 17:09:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180304045] [2024-11-19 17:09:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:26,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:27,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:27,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180304045] [2024-11-19 17:09:27,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180304045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:27,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61938122] [2024-11-19 17:09:27,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:09:27,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:27,240 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) [2024-11-19 17:09:27,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 17:09:27,309 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:09:27,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:27,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 17:09:27,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:27,321 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 [2024-11-19 17:09:27,521 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 [2024-11-19 17:09:27,626 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 [2024-11-19 17:09:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:27,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:28,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61938122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:28,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:28,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2024-11-19 17:09:28,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190791553] [2024-11-19 17:09:28,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:28,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-19 17:09:28,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-19 17:09:28,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2024-11-19 17:09:28,173 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 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) [2024-11-19 17:09:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:29,057 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2024-11-19 17:09:29,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-19 17:09:29,058 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 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 [2024-11-19 17:09:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:29,059 INFO L225 Difference]: With dead ends: 88 [2024-11-19 17:09:29,059 INFO L226 Difference]: Without dead ends: 79 [2024-11-19 17:09:29,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=370, Invalid=2180, Unknown=0, NotChecked=0, Total=2550 [2024-11-19 17:09:29,060 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:29,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 17:09:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-19 17:09:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2024-11-19 17:09:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 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) [2024-11-19 17:09:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2024-11-19 17:09:29,077 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 29 [2024-11-19 17:09:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:29,078 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2024-11-19 17:09:29,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 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) [2024-11-19 17:09:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2024-11-19 17:09:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 17:09:29,079 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:29,079 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:29,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 17:09:29,281 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 [2024-11-19 17:09:29,281 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:29,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:29,282 INFO L85 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2024-11-19 17:09:29,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:29,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633759936] [2024-11-19 17:09:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:29,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:09:29,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:29,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633759936] [2024-11-19 17:09:29,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633759936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:29,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304780446] [2024-11-19 17:09:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:29,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:29,585 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) [2024-11-19 17:09:29,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 17:09:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:29,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 17:09:29,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:29,704 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 [2024-11-19 17:09:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:09:29,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:29,810 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 29 treesize of output 25 [2024-11-19 17:09:29,814 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 17:09:29,814 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 26 treesize of output 16 [2024-11-19 17:09:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 17:09:29,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304780446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:29,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:29,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2024-11-19 17:09:29,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203242978] [2024-11-19 17:09:29,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:29,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 17:09:29,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:29,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 17:09:29,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-19 17:09:29,844 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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) [2024-11-19 17:09:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:30,037 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2024-11-19 17:09:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 17:09:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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 29 [2024-11-19 17:09:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:30,038 INFO L225 Difference]: With dead ends: 106 [2024-11-19 17:09:30,038 INFO L226 Difference]: Without dead ends: 99 [2024-11-19 17:09:30,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:09:30,039 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:30,040 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 105 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:09:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-19 17:09:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2024-11-19 17:09:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 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) [2024-11-19 17:09:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2024-11-19 17:09:30,064 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 29 [2024-11-19 17:09:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:30,064 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2024-11-19 17:09:30,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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) [2024-11-19 17:09:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2024-11-19 17:09:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 17:09:30,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:30,065 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:30,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 17:09:30,266 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 [2024-11-19 17:09:30,266 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:30,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:30,267 INFO L85 PathProgramCache]: Analyzing trace with hash -968292246, now seen corresponding path program 1 times [2024-11-19 17:09:30,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:30,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089793089] [2024-11-19 17:09:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:30,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:30,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:30,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089793089] [2024-11-19 17:09:30,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089793089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:30,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571772681] [2024-11-19 17:09:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:30,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:30,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:30,560 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) [2024-11-19 17:09:30,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 17:09:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:30,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 17:09:30,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:30,644 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 [2024-11-19 17:09:30,673 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 23 treesize of output 11 [2024-11-19 17:09:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:30,691 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:30,739 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 [2024-11-19 17:09:30,744 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 [2024-11-19 17:09:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:30,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571772681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:30,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:30,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-19 17:09:30,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378741301] [2024-11-19 17:09:30,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:30,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 17:09:30,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:30,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 17:09:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-19 17:09:30,768 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2024-11-19 17:09:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:30,918 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2024-11-19 17:09:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 17:09:30,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 [2024-11-19 17:09:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:30,920 INFO L225 Difference]: With dead ends: 113 [2024-11-19 17:09:30,921 INFO L226 Difference]: Without dead ends: 82 [2024-11-19 17:09:30,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-19 17:09:30,922 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:30,922 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 71 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-19 17:09:30,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2024-11-19 17:09:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 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) [2024-11-19 17:09:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2024-11-19 17:09:30,941 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 29 [2024-11-19 17:09:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:30,942 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2024-11-19 17:09:30,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2024-11-19 17:09:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2024-11-19 17:09:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-19 17:09:30,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:30,944 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:30,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:31,147 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 [2024-11-19 17:09:31,148 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:31,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:31,148 INFO L85 PathProgramCache]: Analyzing trace with hash -554569936, now seen corresponding path program 5 times [2024-11-19 17:09:31,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:31,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875138599] [2024-11-19 17:09:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:31,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875138599] [2024-11-19 17:09:31,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875138599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715993034] [2024-11-19 17:09:31,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:09:31,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:31,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:31,274 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) [2024-11-19 17:09:31,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 17:09:31,356 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 17:09:31,357 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:31,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 17:09:31,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:31,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:31,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715993034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:31,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:31,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-19 17:09:31,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040813380] [2024-11-19 17:09:31,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:31,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 17:09:31,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 17:09:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-19 17:09:31,498 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2024-11-19 17:09:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:31,758 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2024-11-19 17:09:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 17:09:31,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 31 [2024-11-19 17:09:31,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:31,759 INFO L225 Difference]: With dead ends: 116 [2024-11-19 17:09:31,759 INFO L226 Difference]: Without dead ends: 101 [2024-11-19 17:09:31,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:09:31,760 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:31,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 25 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:09:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-19 17:09:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2024-11-19 17:09:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 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) [2024-11-19 17:09:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-11-19 17:09:31,772 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 31 [2024-11-19 17:09:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:31,772 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-11-19 17:09:31,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2024-11-19 17:09:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-11-19 17:09:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-19 17:09:31,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:31,773 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:31,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 17:09:31,977 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 [2024-11-19 17:09:31,977 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:31,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:31,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1053387787, now seen corresponding path program 6 times [2024-11-19 17:09:31,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:31,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258860960] [2024-11-19 17:09:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:31,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:32,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258860960] [2024-11-19 17:09:32,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258860960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:32,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716782342] [2024-11-19 17:09:32,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:09:32,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:32,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:32,115 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) [2024-11-19 17:09:32,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 17:09:32,194 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 17:09:32,194 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:32,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 17:09:32,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:32,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 17:09:32,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716782342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:32,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:32,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-19 17:09:32,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483664584] [2024-11-19 17:09:32,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:32,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 17:09:32,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:32,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 17:09:32,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-19 17:09:32,374 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2024-11-19 17:09:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:32,507 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2024-11-19 17:09:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 17:09:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) Word has length 32 [2024-11-19 17:09:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:32,509 INFO L225 Difference]: With dead ends: 106 [2024-11-19 17:09:32,509 INFO L226 Difference]: Without dead ends: 53 [2024-11-19 17:09:32,509 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-19 17:09:32,510 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:32,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-19 17:09:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2024-11-19 17:09:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 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) [2024-11-19 17:09:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-11-19 17:09:32,521 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2024-11-19 17:09:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:32,521 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-11-19 17:09:32,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2024-11-19 17:09:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-11-19 17:09:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 17:09:32,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:32,522 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:32,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 17:09:32,723 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 [2024-11-19 17:09:32,723 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:32,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1383779305, now seen corresponding path program 7 times [2024-11-19 17:09:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:32,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838618749] [2024-11-19 17:09:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:32,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:33,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:33,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838618749] [2024-11-19 17:09:33,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838618749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:33,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423638703] [2024-11-19 17:09:33,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 17:09:33,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:33,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:33,323 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) [2024-11-19 17:09:33,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 17:09:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:33,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-19 17:09:33,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:33,412 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 [2024-11-19 17:09:33,534 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 [2024-11-19 17:09:33,627 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 [2024-11-19 17:09:33,719 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 [2024-11-19 17:09:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:33,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:34,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423638703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:34,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:34,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 36 [2024-11-19 17:09:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204712093] [2024-11-19 17:09:34,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:34,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-19 17:09:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-19 17:09:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2024-11-19 17:09:34,169 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 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) [2024-11-19 17:09:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:35,575 INFO L93 Difference]: Finished difference Result 122 states and 152 transitions. [2024-11-19 17:09:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-19 17:09:35,576 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 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 37 [2024-11-19 17:09:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:35,576 INFO L225 Difference]: With dead ends: 122 [2024-11-19 17:09:35,577 INFO L226 Difference]: Without dead ends: 113 [2024-11-19 17:09:35,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=505, Invalid=4051, Unknown=0, NotChecked=0, Total=4556 [2024-11-19 17:09:35,579 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:35,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 87 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 17:09:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-19 17:09:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2024-11-19 17:09:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.2604166666666667) internal successors, (121), 96 states have internal predecessors, (121), 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) [2024-11-19 17:09:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2024-11-19 17:09:35,595 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 37 [2024-11-19 17:09:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:35,595 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2024-11-19 17:09:35,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 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) [2024-11-19 17:09:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2024-11-19 17:09:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 17:09:35,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:35,597 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:35,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 17:09:35,800 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 [2024-11-19 17:09:35,801 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:35,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:35,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1441037607, now seen corresponding path program 2 times [2024-11-19 17:09:35,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:35,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381703331] [2024-11-19 17:09:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:35,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:36,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:36,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381703331] [2024-11-19 17:09:36,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381703331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:36,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935780511] [2024-11-19 17:09:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:09:36,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:36,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:36,286 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) [2024-11-19 17:09:36,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 17:09:36,367 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:09:36,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:36,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 17:09:36,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:36,506 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 23 treesize of output 13 [2024-11-19 17:09:36,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:36,631 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 21 treesize of output 15 [2024-11-19 17:09:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:36,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:36,993 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 31 treesize of output 27 [2024-11-19 17:09:37,001 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 17:09:37,001 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 28 treesize of output 16 [2024-11-19 17:09:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:37,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935780511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:37,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:37,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2024-11-19 17:09:37,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632767097] [2024-11-19 17:09:37,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:37,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-19 17:09:37,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:37,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-19 17:09:37,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2024-11-19 17:09:37,189 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 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) [2024-11-19 17:09:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:38,539 INFO L93 Difference]: Finished difference Result 254 states and 327 transitions. [2024-11-19 17:09:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-19 17:09:38,540 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 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 37 [2024-11-19 17:09:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:38,541 INFO L225 Difference]: With dead ends: 254 [2024-11-19 17:09:38,541 INFO L226 Difference]: Without dead ends: 245 [2024-11-19 17:09:38,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=923, Invalid=4627, Unknown=0, NotChecked=0, Total=5550 [2024-11-19 17:09:38,543 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 323 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:38,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 125 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 17:09:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-19 17:09:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 171. [2024-11-19 17:09:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2941176470588236) internal successors, (220), 170 states have internal predecessors, (220), 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) [2024-11-19 17:09:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 220 transitions. [2024-11-19 17:09:38,572 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 220 transitions. Word has length 37 [2024-11-19 17:09:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:38,572 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 220 transitions. [2024-11-19 17:09:38,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 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) [2024-11-19 17:09:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 220 transitions. [2024-11-19 17:09:38,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 17:09:38,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:38,573 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:38,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 17:09:38,773 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 [2024-11-19 17:09:38,774 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:38,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -147310295, now seen corresponding path program 2 times [2024-11-19 17:09:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:38,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161386085] [2024-11-19 17:09:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:38,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:39,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:39,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161386085] [2024-11-19 17:09:39,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161386085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:39,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296854538] [2024-11-19 17:09:39,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:09:39,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:39,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:39,022 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) [2024-11-19 17:09:39,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 17:09:39,119 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:09:39,119 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:39,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 17:09:39,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:39,171 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 [2024-11-19 17:09:39,221 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 23 treesize of output 11 [2024-11-19 17:09:39,255 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 23 treesize of output 11 [2024-11-19 17:09:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:39,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:39,322 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 [2024-11-19 17:09:39,324 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 [2024-11-19 17:09:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296854538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:39,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:39,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2024-11-19 17:09:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901688606] [2024-11-19 17:09:39,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:39,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 17:09:39,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 17:09:39,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-19 17:09:39,335 INFO L87 Difference]: Start difference. First operand 171 states and 220 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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) [2024-11-19 17:09:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:39,606 INFO L93 Difference]: Finished difference Result 286 states and 376 transitions. [2024-11-19 17:09:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 17:09:39,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 37 [2024-11-19 17:09:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:39,608 INFO L225 Difference]: With dead ends: 286 [2024-11-19 17:09:39,608 INFO L226 Difference]: Without dead ends: 183 [2024-11-19 17:09:39,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-19 17:09:39,609 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:39,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 104 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:09:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-19 17:09:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 171. [2024-11-19 17:09:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2823529411764707) internal successors, (218), 170 states have internal predecessors, (218), 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) [2024-11-19 17:09:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 218 transitions. [2024-11-19 17:09:39,638 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 218 transitions. Word has length 37 [2024-11-19 17:09:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:39,638 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 218 transitions. [2024-11-19 17:09:39,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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) [2024-11-19 17:09:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 218 transitions. [2024-11-19 17:09:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-19 17:09:39,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:39,639 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:39,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 17:09:39,843 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 [2024-11-19 17:09:39,844 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:39,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1016239403, now seen corresponding path program 8 times [2024-11-19 17:09:39,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:39,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127830331] [2024-11-19 17:09:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:39,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:39,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:39,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127830331] [2024-11-19 17:09:39,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127830331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:39,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978709217] [2024-11-19 17:09:39,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:09:39,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:39,996 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) [2024-11-19 17:09:39,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 17:09:40,084 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:09:40,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:40,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 17:09:40,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:40,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:40,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978709217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:40,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:40,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-19 17:09:40,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212653875] [2024-11-19 17:09:40,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:40,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 17:09:40,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:40,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 17:09:40,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-19 17:09:40,249 INFO L87 Difference]: Start difference. First operand 171 states and 218 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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) [2024-11-19 17:09:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:40,528 INFO L93 Difference]: Finished difference Result 202 states and 258 transitions. [2024-11-19 17:09:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 17:09:40,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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 [2024-11-19 17:09:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:40,530 INFO L225 Difference]: With dead ends: 202 [2024-11-19 17:09:40,530 INFO L226 Difference]: Without dead ends: 184 [2024-11-19 17:09:40,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-11-19 17:09:40,531 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:40,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 47 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:09:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-19 17:09:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 104. [2024-11-19 17:09:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.233009708737864) internal successors, (127), 103 states have internal predecessors, (127), 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) [2024-11-19 17:09:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2024-11-19 17:09:40,550 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 39 [2024-11-19 17:09:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:40,550 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2024-11-19 17:09:40,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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) [2024-11-19 17:09:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2024-11-19 17:09:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 17:09:40,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:40,551 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:40,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 17:09:40,751 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 [2024-11-19 17:09:40,752 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:40,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:40,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1682760144, now seen corresponding path program 9 times [2024-11-19 17:09:40,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:40,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848962442] [2024-11-19 17:09:40,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:40,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 17:09:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848962442] [2024-11-19 17:09:40,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848962442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996605222] [2024-11-19 17:09:40,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:09:40,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:40,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:40,886 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) [2024-11-19 17:09:40,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 17:09:40,988 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-19 17:09:40,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:40,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 17:09:40,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:09:41,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 17:09:41,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996605222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:41,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:41,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-19 17:09:41,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105178702] [2024-11-19 17:09:41,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:41,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 17:09:41,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:41,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 17:09:41,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-19 17:09:41,144 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2024-11-19 17:09:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:41,296 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2024-11-19 17:09:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 17:09:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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 40 [2024-11-19 17:09:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:41,298 INFO L225 Difference]: With dead ends: 133 [2024-11-19 17:09:41,298 INFO L226 Difference]: Without dead ends: 61 [2024-11-19 17:09:41,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:09:41,300 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:41,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 34 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-19 17:09:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2024-11-19 17:09:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 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) [2024-11-19 17:09:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-19 17:09:41,311 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 40 [2024-11-19 17:09:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:41,311 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-19 17:09:41,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2024-11-19 17:09:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-19 17:09:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-19 17:09:41,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:41,312 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:41,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:41,512 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 [2024-11-19 17:09:41,513 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:41,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2111860654, now seen corresponding path program 10 times [2024-11-19 17:09:41,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:41,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884294266] [2024-11-19 17:09:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:41,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 17:09:42,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:42,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884294266] [2024-11-19 17:09:42,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884294266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:42,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096007730] [2024-11-19 17:09:42,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:09:42,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:42,231 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) [2024-11-19 17:09:42,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 17:09:42,341 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:09:42,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:42,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-19 17:09:42,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:42,349 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 [2024-11-19 17:09:42,686 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 [2024-11-19 17:09:42,764 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 [2024-11-19 17:09:42,854 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 [2024-11-19 17:09:42,959 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 [2024-11-19 17:09:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:43,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:43,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096007730] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:43,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:43,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2024-11-19 17:09:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728791509] [2024-11-19 17:09:43,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:43,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-19 17:09:43,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-19 17:09:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=3027, Unknown=0, NotChecked=0, Total=3306 [2024-11-19 17:09:43,981 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 58 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 58 states have internal predecessors, (108), 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) [2024-11-19 17:09:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:47,389 INFO L93 Difference]: Finished difference Result 177 states and 224 transitions. [2024-11-19 17:09:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-19 17:09:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 58 states have internal predecessors, (108), 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 45 [2024-11-19 17:09:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:47,390 INFO L225 Difference]: With dead ends: 177 [2024-11-19 17:09:47,390 INFO L226 Difference]: Without dead ends: 167 [2024-11-19 17:09:47,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1170, Invalid=11712, Unknown=0, NotChecked=0, Total=12882 [2024-11-19 17:09:47,393 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 107 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:47,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 117 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-19 17:09:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-19 17:09:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 122. [2024-11-19 17:09:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2644628099173554) internal successors, (153), 121 states have internal predecessors, (153), 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) [2024-11-19 17:09:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2024-11-19 17:09:47,420 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 45 [2024-11-19 17:09:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:47,420 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2024-11-19 17:09:47,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 58 states have internal predecessors, (108), 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) [2024-11-19 17:09:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2024-11-19 17:09:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-19 17:09:47,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:47,420 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:47,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:47,621 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 [2024-11-19 17:09:47,621 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:47,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2054602352, now seen corresponding path program 3 times [2024-11-19 17:09:47,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:47,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141987060] [2024-11-19 17:09:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:48,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:48,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141987060] [2024-11-19 17:09:48,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141987060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:48,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971899248] [2024-11-19 17:09:48,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:09:48,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:48,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:48,085 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) [2024-11-19 17:09:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 17:09:48,192 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 17:09:48,192 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:48,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 17:09:48,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:48,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-19 17:09:48,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:09:48,325 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 [2024-11-19 17:09:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:09:48,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-19 17:09:48,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971899248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:48,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:48,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 26 [2024-11-19 17:09:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28340460] [2024-11-19 17:09:48,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:48,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 17:09:48,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:48,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 17:09:48,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2024-11-19 17:09:48,577 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 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) [2024-11-19 17:09:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:50,303 INFO L93 Difference]: Finished difference Result 254 states and 326 transitions. [2024-11-19 17:09:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-19 17:09:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 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) Word has length 45 [2024-11-19 17:09:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:50,304 INFO L225 Difference]: With dead ends: 254 [2024-11-19 17:09:50,304 INFO L226 Difference]: Without dead ends: 247 [2024-11-19 17:09:50,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1192, Invalid=7364, Unknown=0, NotChecked=0, Total=8556 [2024-11-19 17:09:50,307 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 113 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:50,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 78 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 17:09:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-19 17:09:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 187. [2024-11-19 17:09:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.2956989247311828) internal successors, (241), 186 states have internal predecessors, (241), 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) [2024-11-19 17:09:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 241 transitions. [2024-11-19 17:09:50,362 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 241 transitions. Word has length 45 [2024-11-19 17:09:50,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:50,362 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 241 transitions. [2024-11-19 17:09:50,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 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) [2024-11-19 17:09:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 241 transitions. [2024-11-19 17:09:50,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-19 17:09:50,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:50,363 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:50,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:50,567 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 [2024-11-19 17:09:50,567 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:50,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1431802284, now seen corresponding path program 4 times [2024-11-19 17:09:50,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:50,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404394119] [2024-11-19 17:09:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:50,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 17:09:51,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:51,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404394119] [2024-11-19 17:09:51,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404394119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:51,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425855491] [2024-11-19 17:09:51,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:09:51,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:51,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:51,105 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) [2024-11-19 17:09:51,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 17:09:51,197 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:09:51,197 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:51,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 17:09:51,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:51,254 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 23 treesize of output 13 [2024-11-19 17:09:51,294 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-19 17:09:51,294 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 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-19 17:09:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 17:09:51,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:51,547 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 36 treesize of output 32 [2024-11-19 17:09:51,553 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 17:09:51,554 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 52 treesize of output 42 [2024-11-19 17:09:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 17:09:51,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425855491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:51,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:51,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 13] total 36 [2024-11-19 17:09:51,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201063192] [2024-11-19 17:09:51,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:51,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-19 17:09:51,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-19 17:09:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2024-11-19 17:09:51,582 INFO L87 Difference]: Start difference. First operand 187 states and 241 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 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) [2024-11-19 17:09:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:52,174 INFO L93 Difference]: Finished difference Result 211 states and 269 transitions. [2024-11-19 17:09:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 17:09:52,175 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 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 45 [2024-11-19 17:09:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:52,176 INFO L225 Difference]: With dead ends: 211 [2024-11-19 17:09:52,176 INFO L226 Difference]: Without dead ends: 184 [2024-11-19 17:09:52,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=2291, Unknown=0, NotChecked=0, Total=2652 [2024-11-19 17:09:52,177 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 93 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:52,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 100 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 17:09:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-19 17:09:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 173. [2024-11-19 17:09:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.25) internal successors, (215), 172 states have internal predecessors, (215), 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) [2024-11-19 17:09:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2024-11-19 17:09:52,217 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 45 [2024-11-19 17:09:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:52,217 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2024-11-19 17:09:52,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 36 states have internal predecessors, (84), 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) [2024-11-19 17:09:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2024-11-19 17:09:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-19 17:09:52,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:52,218 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:52,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:52,419 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 [2024-11-19 17:09:52,420 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:52,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:52,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1422716494, now seen corresponding path program 3 times [2024-11-19 17:09:52,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:52,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933418692] [2024-11-19 17:09:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:52,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 17:09:52,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:52,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933418692] [2024-11-19 17:09:52,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933418692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:52,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420571177] [2024-11-19 17:09:52,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:09:52,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:52,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:52,815 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) [2024-11-19 17:09:52,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 17:09:52,920 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-19 17:09:52,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:52,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-19 17:09:52,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:52,949 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 [2024-11-19 17:09:52,969 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 23 treesize of output 11 [2024-11-19 17:09:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:09:52,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:09:53,011 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2024-11-19 17:09:53,012 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 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-19 17:09:53,075 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 17:09:53,075 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 22 treesize of output 16 [2024-11-19 17:09:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:53,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:56,363 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 [2024-11-19 17:09:56,365 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 [2024-11-19 17:09:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 17:09:56,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420571177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:56,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:56,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 22] total 44 [2024-11-19 17:09:56,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736462529] [2024-11-19 17:09:56,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:56,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-19 17:09:56,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-19 17:09:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1600, Unknown=5, NotChecked=0, Total=1892 [2024-11-19 17:09:56,452 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 44 states have internal predecessors, (102), 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) [2024-11-19 17:09:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:58,171 INFO L93 Difference]: Finished difference Result 400 states and 513 transitions. [2024-11-19 17:09:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-19 17:09:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 44 states have internal predecessors, (102), 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 45 [2024-11-19 17:09:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:58,172 INFO L225 Difference]: With dead ends: 400 [2024-11-19 17:09:58,172 INFO L226 Difference]: Without dead ends: 278 [2024-11-19 17:09:58,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3825 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1733, Invalid=10034, Unknown=5, NotChecked=0, Total=11772 [2024-11-19 17:09:58,176 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 147 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:58,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 91 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 17:09:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-19 17:09:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 200. [2024-11-19 17:09:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.2462311557788945) internal successors, (248), 199 states have internal predecessors, (248), 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) [2024-11-19 17:09:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2024-11-19 17:09:58,228 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 45 [2024-11-19 17:09:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:58,228 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2024-11-19 17:09:58,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 44 states have internal predecessors, (102), 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) [2024-11-19 17:09:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2024-11-19 17:09:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 17:09:58,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:58,229 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:58,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 17:09:58,430 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 [2024-11-19 17:09:58,430 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:58,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash -220752601, now seen corresponding path program 11 times [2024-11-19 17:09:58,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:58,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707595260] [2024-11-19 17:09:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:58,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 17:09:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707595260] [2024-11-19 17:09:58,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707595260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503069220] [2024-11-19 17:09:58,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:09:58,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:58,598 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) [2024-11-19 17:09:58,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 17:09:58,760 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-19 17:09:58,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:58,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 17:09:58,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 17:09:58,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 17:09:58,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503069220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:58,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:58,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-19 17:09:58,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844115649] [2024-11-19 17:09:58,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:58,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 17:09:58,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:58,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 17:09:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-19 17:09:58,970 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 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) [2024-11-19 17:09:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:09:59,166 INFO L93 Difference]: Finished difference Result 298 states and 360 transitions. [2024-11-19 17:09:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 17:09:59,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 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 48 [2024-11-19 17:09:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:09:59,168 INFO L225 Difference]: With dead ends: 298 [2024-11-19 17:09:59,168 INFO L226 Difference]: Without dead ends: 169 [2024-11-19 17:09:59,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-19 17:09:59,169 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 89 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:09:59,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 42 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 17:09:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-19 17:09:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 144. [2024-11-19 17:09:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1748251748251748) internal successors, (168), 143 states have internal predecessors, (168), 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) [2024-11-19 17:09:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 168 transitions. [2024-11-19 17:09:59,197 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 168 transitions. Word has length 48 [2024-11-19 17:09:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:09:59,197 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 168 transitions. [2024-11-19 17:09:59,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 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) [2024-11-19 17:09:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 168 transitions. [2024-11-19 17:09:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 17:09:59,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:09:59,198 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:09:59,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-19 17:09:59,398 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 [2024-11-19 17:09:59,399 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:09:59,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:09:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash -961964458, now seen corresponding path program 12 times [2024-11-19 17:09:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:09:59,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331412048] [2024-11-19 17:09:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:09:59,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:09:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:09:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 17:09:59,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:09:59,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331412048] [2024-11-19 17:09:59,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331412048] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:09:59,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734816131] [2024-11-19 17:09:59,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:09:59,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:09:59,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:09:59,580 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) [2024-11-19 17:09:59,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 17:09:59,714 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-19 17:09:59,714 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:09:59,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 17:09:59,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:09:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:09:59,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:09:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 17:09:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734816131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:09:59,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:09:59,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 22 [2024-11-19 17:09:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118890746] [2024-11-19 17:09:59,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:09:59,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 17:09:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:09:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 17:09:59,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2024-11-19 17:09:59,927 INFO L87 Difference]: Start difference. First operand 144 states and 168 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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) [2024-11-19 17:10:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:00,320 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2024-11-19 17:10:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-19 17:10:00,321 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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 [2024-11-19 17:10:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:00,322 INFO L225 Difference]: With dead ends: 250 [2024-11-19 17:10:00,322 INFO L226 Difference]: Without dead ends: 198 [2024-11-19 17:10:00,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 80 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=329, Invalid=1153, Unknown=0, NotChecked=0, Total=1482 [2024-11-19 17:10:00,323 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 213 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:00,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 47 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:10:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-19 17:10:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 141. [2024-11-19 17:10:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 140 states have internal predecessors, (165), 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) [2024-11-19 17:10:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 165 transitions. [2024-11-19 17:10:00,356 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 165 transitions. Word has length 49 [2024-11-19 17:10:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:00,357 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 165 transitions. [2024-11-19 17:10:00,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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) [2024-11-19 17:10:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 165 transitions. [2024-11-19 17:10:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 17:10:00,357 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:00,357 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:00,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:00,558 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 [2024-11-19 17:10:00,558 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:00,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:00,558 INFO L85 PathProgramCache]: Analyzing trace with hash 663114381, now seen corresponding path program 13 times [2024-11-19 17:10:00,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:00,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17817592] [2024-11-19 17:10:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:00,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:01,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:01,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17817592] [2024-11-19 17:10:01,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17817592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:01,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708180523] [2024-11-19 17:10:01,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 17:10:01,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:01,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:01,501 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) [2024-11-19 17:10:01,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 17:10:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:01,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-19 17:10:01,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:01,629 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 [2024-11-19 17:10:01,778 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 [2024-11-19 17:10:01,853 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 [2024-11-19 17:10:01,944 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 [2024-11-19 17:10:02,051 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 [2024-11-19 17:10:02,164 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 [2024-11-19 17:10:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:02,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:03,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708180523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:03,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:03,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 54 [2024-11-19 17:10:03,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392391300] [2024-11-19 17:10:03,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:03,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-19 17:10:03,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:03,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-19 17:10:03,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2674, Unknown=0, NotChecked=0, Total=2862 [2024-11-19 17:10:03,100 INFO L87 Difference]: Start difference. First operand 141 states and 165 transitions. Second operand has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 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) [2024-11-19 17:10:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:05,842 INFO L93 Difference]: Finished difference Result 321 states and 385 transitions. [2024-11-19 17:10:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-19 17:10:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 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 53 [2024-11-19 17:10:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:05,844 INFO L225 Difference]: With dead ends: 321 [2024-11-19 17:10:05,844 INFO L226 Difference]: Without dead ends: 299 [2024-11-19 17:10:05,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=760, Invalid=9746, Unknown=0, NotChecked=0, Total=10506 [2024-11-19 17:10:05,846 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:05,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 122 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-19 17:10:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-19 17:10:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 188. [2024-11-19 17:10:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.213903743315508) internal successors, (227), 187 states have internal predecessors, (227), 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) [2024-11-19 17:10:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 227 transitions. [2024-11-19 17:10:05,903 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 227 transitions. Word has length 53 [2024-11-19 17:10:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:05,903 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 227 transitions. [2024-11-19 17:10:05,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 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) [2024-11-19 17:10:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 227 transitions. [2024-11-19 17:10:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 17:10:05,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:05,904 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:05,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:06,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:06,104 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:06,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:06,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1085065651, now seen corresponding path program 4 times [2024-11-19 17:10:06,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:06,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26447972] [2024-11-19 17:10:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:06,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:06,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26447972] [2024-11-19 17:10:06,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26447972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:06,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565677877] [2024-11-19 17:10:06,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:10:06,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:06,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:06,653 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:06,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-19 17:10:06,767 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:10:06,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:06,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-19 17:10:06,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:06,776 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 [2024-11-19 17:10:06,869 INFO L349 Elim1Store]: treesize reduction 22, result has 42.1 percent of original size [2024-11-19 17:10:06,869 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 1 case distinctions, treesize of input 28 treesize of output 20 [2024-11-19 17:10:06,945 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2024-11-19 17:10:06,945 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 1 case distinctions, treesize of input 36 treesize of output 24 [2024-11-19 17:10:07,032 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2024-11-19 17:10:07,032 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 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-19 17:10:07,116 INFO L349 Elim1Store]: treesize reduction 24, result has 40.0 percent of original size [2024-11-19 17:10:07,116 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 1 case distinctions, treesize of input 42 treesize of output 30 [2024-11-19 17:10:07,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 17:10:07,188 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 22 treesize of output 15 [2024-11-19 17:10:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-19 17:10:07,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-19 17:10:07,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565677877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:07,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:07,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 40 [2024-11-19 17:10:07,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909897082] [2024-11-19 17:10:07,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:07,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-19 17:10:07,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-19 17:10:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 17:10:07,506 INFO L87 Difference]: Start difference. First operand 188 states and 227 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 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) [2024-11-19 17:10:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:09,587 INFO L93 Difference]: Finished difference Result 345 states and 449 transitions. [2024-11-19 17:10:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-19 17:10:09,587 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 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 53 [2024-11-19 17:10:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:09,589 INFO L225 Difference]: With dead ends: 345 [2024-11-19 17:10:09,589 INFO L226 Difference]: Without dead ends: 274 [2024-11-19 17:10:09,589 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1728, Invalid=7392, Unknown=0, NotChecked=0, Total=9120 [2024-11-19 17:10:09,590 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:09,590 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 96 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 17:10:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-19 17:10:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 220. [2024-11-19 17:10:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.2968036529680365) internal successors, (284), 219 states have internal predecessors, (284), 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) [2024-11-19 17:10:09,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 284 transitions. [2024-11-19 17:10:09,660 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 284 transitions. Word has length 53 [2024-11-19 17:10:09,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:09,660 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 284 transitions. [2024-11-19 17:10:09,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 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) [2024-11-19 17:10:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 284 transitions. [2024-11-19 17:10:09,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 17:10:09,661 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:09,661 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:09,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-19 17:10:09,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:09,866 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:09,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash -469998324, now seen corresponding path program 14 times [2024-11-19 17:10:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:09,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212259922] [2024-11-19 17:10:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:09,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:10,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212259922] [2024-11-19 17:10:10,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212259922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872256380] [2024-11-19 17:10:10,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 17:10:10,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:10,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:10,073 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:10,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-19 17:10:10,209 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 17:10:10,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:10,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 17:10:10,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:10,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-19 17:10:10,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872256380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:10,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:10,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-19 17:10:10,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105154007] [2024-11-19 17:10:10,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:10,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 17:10:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 17:10:10,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-19 17:10:10,496 INFO L87 Difference]: Start difference. First operand 220 states and 284 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2024-11-19 17:10:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:10,743 INFO L93 Difference]: Finished difference Result 303 states and 380 transitions. [2024-11-19 17:10:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 17:10:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) Word has length 56 [2024-11-19 17:10:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:10,745 INFO L225 Difference]: With dead ends: 303 [2024-11-19 17:10:10,745 INFO L226 Difference]: Without dead ends: 146 [2024-11-19 17:10:10,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-11-19 17:10:10,746 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:10,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 49 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:10:10,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-19 17:10:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2024-11-19 17:10:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.2671755725190839) internal successors, (166), 131 states have internal predecessors, (166), 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) [2024-11-19 17:10:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2024-11-19 17:10:10,776 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 56 [2024-11-19 17:10:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:10,776 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2024-11-19 17:10:10,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2024-11-19 17:10:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2024-11-19 17:10:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-19 17:10:10,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:10,777 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:10,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-19 17:10:10,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-19 17:10:10,978 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:10,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash -844503370, now seen corresponding path program 15 times [2024-11-19 17:10:10,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:10,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366972417] [2024-11-19 17:10:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-19 17:10:12,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:12,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366972417] [2024-11-19 17:10:12,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366972417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:12,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803368035] [2024-11-19 17:10:12,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 17:10:12,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:12,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:12,055 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:12,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-19 17:10:12,205 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-19 17:10:12,205 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:12,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-19 17:10:12,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:12,311 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 [2024-11-19 17:10:12,869 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 [2024-11-19 17:10:12,966 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 [2024-11-19 17:10:13,074 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 [2024-11-19 17:10:13,214 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 [2024-11-19 17:10:13,354 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 [2024-11-19 17:10:13,515 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 [2024-11-19 17:10:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 17:10:13,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 17:10:14,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803368035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:14,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:14,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 25] total 74 [2024-11-19 17:10:14,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797586187] [2024-11-19 17:10:14,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:14,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-19 17:10:14,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-19 17:10:14,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=5072, Unknown=0, NotChecked=0, Total=5402 [2024-11-19 17:10:14,910 INFO L87 Difference]: Start difference. First operand 132 states and 166 transitions. Second operand has 74 states, 74 states have (on average 1.8243243243243243) internal successors, (135), 74 states have internal predecessors, (135), 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) [2024-11-19 17:10:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:21,469 INFO L93 Difference]: Finished difference Result 433 states and 555 transitions. [2024-11-19 17:10:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-11-19 17:10:21,469 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.8243243243243243) internal successors, (135), 74 states have internal predecessors, (135), 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 [2024-11-19 17:10:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:21,471 INFO L225 Difference]: With dead ends: 433 [2024-11-19 17:10:21,471 INFO L226 Difference]: Without dead ends: 427 [2024-11-19 17:10:21,474 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2326, Invalid=26404, Unknown=0, NotChecked=0, Total=28730 [2024-11-19 17:10:21,474 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 208 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 4667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:21,475 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 99 Invalid, 4667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 4302 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-19 17:10:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-19 17:10:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 305. [2024-11-19 17:10:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.2894736842105263) internal successors, (392), 304 states have internal predecessors, (392), 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) [2024-11-19 17:10:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 392 transitions. [2024-11-19 17:10:21,582 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 392 transitions. Word has length 61 [2024-11-19 17:10:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:21,583 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 392 transitions. [2024-11-19 17:10:21,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.8243243243243243) internal successors, (135), 74 states have internal predecessors, (135), 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) [2024-11-19 17:10:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 392 transitions. [2024-11-19 17:10:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-19 17:10:21,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:21,584 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:21,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:21,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 17:10:21,784 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:21,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash -164445000, now seen corresponding path program 5 times [2024-11-19 17:10:21,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:21,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893922331] [2024-11-19 17:10:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 23 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 17:10:22,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:22,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893922331] [2024-11-19 17:10:22,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893922331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:22,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634877230] [2024-11-19 17:10:22,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:10:22,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:22,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:22,484 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:22,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-19 17:10:23,474 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-19 17:10:23,474 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:23,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 17:10:23,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:23,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-19 17:10:23,541 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 23 treesize of output 13 [2024-11-19 17:10:23,594 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-19 17:10:23,594 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 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-19 17:10:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-19 17:10:23,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:23,885 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 36 treesize of output 32 [2024-11-19 17:10:23,889 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 17:10:23,889 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 52 treesize of output 42 [2024-11-19 17:10:23,938 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 12 treesize of output 4 [2024-11-19 17:10:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-19 17:10:23,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634877230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:23,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:23,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 18] total 38 [2024-11-19 17:10:23,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696315784] [2024-11-19 17:10:23,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:23,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 17:10:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 17:10:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 17:10:23,941 INFO L87 Difference]: Start difference. First operand 305 states and 392 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 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) [2024-11-19 17:10:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:25,192 INFO L93 Difference]: Finished difference Result 521 states and 670 transitions. [2024-11-19 17:10:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-19 17:10:25,193 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 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 [2024-11-19 17:10:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:25,194 INFO L225 Difference]: With dead ends: 521 [2024-11-19 17:10:25,195 INFO L226 Difference]: Without dead ends: 507 [2024-11-19 17:10:25,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=512, Invalid=3778, Unknown=0, NotChecked=0, Total=4290 [2024-11-19 17:10:25,196 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 177 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:25,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 140 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 17:10:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2024-11-19 17:10:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 447. [2024-11-19 17:10:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.2735426008968609) internal successors, (568), 446 states have internal predecessors, (568), 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) [2024-11-19 17:10:25,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 568 transitions. [2024-11-19 17:10:25,386 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 568 transitions. Word has length 61 [2024-11-19 17:10:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:25,387 INFO L471 AbstractCegarLoop]: Abstraction has 447 states and 568 transitions. [2024-11-19 17:10:25,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 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) [2024-11-19 17:10:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 568 transitions. [2024-11-19 17:10:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-19 17:10:25,388 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:25,388 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:25,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-19 17:10:25,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 17:10:25,590 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:25,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1221758394, now seen corresponding path program 5 times [2024-11-19 17:10:25,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:25,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138437519] [2024-11-19 17:10:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:25,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 71 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-19 17:10:26,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:26,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138437519] [2024-11-19 17:10:26,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138437519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:26,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993186681] [2024-11-19 17:10:26,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:10:26,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:26,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:26,249 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:26,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-19 17:10:29,842 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-19 17:10:29,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:29,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 17:10:29,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:29,934 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 [2024-11-19 17:10:29,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 17:10:29,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-19 17:10:30,045 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 23 treesize of output 11 [2024-11-19 17:10:30,087 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 23 treesize of output 11 [2024-11-19 17:10:30,129 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 23 treesize of output 11 [2024-11-19 17:10:30,174 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 23 treesize of output 11 [2024-11-19 17:10:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-19 17:10:30,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:30,466 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 23 treesize of output 21 [2024-11-19 17:10:30,468 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 94 treesize of output 86 [2024-11-19 17:10:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-19 17:10:30,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993186681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:30,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:30,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 16] total 44 [2024-11-19 17:10:30,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008622937] [2024-11-19 17:10:30,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:30,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-19 17:10:30,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:30,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-19 17:10:30,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2024-11-19 17:10:30,550 INFO L87 Difference]: Start difference. First operand 447 states and 568 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 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) [2024-11-19 17:10:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:31,383 INFO L93 Difference]: Finished difference Result 493 states and 629 transitions. [2024-11-19 17:10:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-19 17:10:31,384 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 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 [2024-11-19 17:10:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:31,385 INFO L225 Difference]: With dead ends: 493 [2024-11-19 17:10:31,385 INFO L226 Difference]: Without dead ends: 292 [2024-11-19 17:10:31,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=498, Invalid=3662, Unknown=0, NotChecked=0, Total=4160 [2024-11-19 17:10:31,387 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:31,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 106 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 17:10:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-11-19 17:10:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2024-11-19 17:10:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.2439024390243902) internal successors, (357), 287 states have internal predecessors, (357), 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) [2024-11-19 17:10:31,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 357 transitions. [2024-11-19 17:10:31,486 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 357 transitions. Word has length 61 [2024-11-19 17:10:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:31,486 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 357 transitions. [2024-11-19 17:10:31,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 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) [2024-11-19 17:10:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 357 transitions. [2024-11-19 17:10:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-19 17:10:31,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:31,487 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:31,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-19 17:10:31,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-19 17:10:31,687 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:31,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:31,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1437404093, now seen corresponding path program 16 times [2024-11-19 17:10:31,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:31,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414208741] [2024-11-19 17:10:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:31,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-19 17:10:31,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:31,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414208741] [2024-11-19 17:10:31,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414208741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593078819] [2024-11-19 17:10:31,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 17:10:31,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:31,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:31,928 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:31,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-19 17:10:32,077 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 17:10:32,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:32,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 17:10:32,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 17:10:32,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-19 17:10:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593078819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:32,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:32,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-19 17:10:32,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401331928] [2024-11-19 17:10:32,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:32,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 17:10:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 17:10:32,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-19 17:10:32,371 INFO L87 Difference]: Start difference. First operand 288 states and 357 transitions. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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) [2024-11-19 17:10:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:32,646 INFO L93 Difference]: Finished difference Result 360 states and 440 transitions. [2024-11-19 17:10:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 17:10:32,646 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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 64 [2024-11-19 17:10:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:32,647 INFO L225 Difference]: With dead ends: 360 [2024-11-19 17:10:32,647 INFO L226 Difference]: Without dead ends: 146 [2024-11-19 17:10:32,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 106 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-11-19 17:10:32,648 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:32,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 48 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:10:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-19 17:10:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 126. [2024-11-19 17:10:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.216) internal successors, (152), 125 states have internal predecessors, (152), 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) [2024-11-19 17:10:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2024-11-19 17:10:32,681 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 64 [2024-11-19 17:10:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:32,681 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2024-11-19 17:10:32,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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) [2024-11-19 17:10:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2024-11-19 17:10:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-19 17:10:32,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:32,682 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:32,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:32,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:32,882 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:32,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:32,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1760559480, now seen corresponding path program 17 times [2024-11-19 17:10:32,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:32,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165838655] [2024-11-19 17:10:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:32,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-19 17:10:33,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:33,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165838655] [2024-11-19 17:10:33,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165838655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492457290] [2024-11-19 17:10:33,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 17:10:33,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:33,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:33,197 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:33,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-19 17:10:35,967 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-19 17:10:35,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:35,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 17:10:35,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-19 17:10:36,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 17:10:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-19 17:10:36,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492457290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 17:10:36,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 17:10:36,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-19 17:10:36,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032255800] [2024-11-19 17:10:36,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 17:10:36,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 17:10:36,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 17:10:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 17:10:36,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-19 17:10:36,258 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 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) [2024-11-19 17:10:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 17:10:36,584 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2024-11-19 17:10:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 17:10:36,585 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 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 66 [2024-11-19 17:10:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 17:10:36,586 INFO L225 Difference]: With dead ends: 145 [2024-11-19 17:10:36,586 INFO L226 Difference]: Without dead ends: 141 [2024-11-19 17:10:36,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 109 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 17:10:36,587 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 181 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 17:10:36,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 27 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 17:10:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-19 17:10:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2024-11-19 17:10:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 131 states have internal predecessors, (160), 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) [2024-11-19 17:10:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2024-11-19 17:10:36,635 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 66 [2024-11-19 17:10:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 17:10:36,635 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2024-11-19 17:10:36,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 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) [2024-11-19 17:10:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2024-11-19 17:10:36,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-19 17:10:36,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 17:10:36,636 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 17:10:36,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-19 17:10:36,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:36,836 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 17:10:36,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 17:10:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1442778319, now seen corresponding path program 18 times [2024-11-19 17:10:36,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 17:10:36,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648448545] [2024-11-19 17:10:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 17:10:36,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 17:10:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 17:10:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-19 17:10:38,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 17:10:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648448545] [2024-11-19 17:10:38,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648448545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 17:10:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871852488] [2024-11-19 17:10:38,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 17:10:38,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 17:10:38,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 17:10:38,303 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 17:10:38,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-19 17:10:38,696 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-19 17:10:38,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 17:10:38,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-19 17:10:38,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 17:10:38,704 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 [2024-11-19 17:10:38,868 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 [2024-11-19 17:10:38,964 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 [2024-11-19 17:10:39,069 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 [2024-11-19 17:10:39,202 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 [2024-11-19 17:10:39,358 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 [2024-11-19 17:10:39,516 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 [2024-11-19 17:10:39,709 INFO L349 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2024-11-19 17:10:39,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 22 [2024-11-19 17:10:39,712 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 [2024-11-19 17:10:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-19 17:10:39,862 INFO L311 TraceCheckSpWp]: Computing backward predicates...