./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/xor4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/xor4.i -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 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:22:16,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:22:16,898 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:22:16,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:22:16,903 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:22:16,921 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:22:16,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:22:16,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:22:16,923 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:22:16,923 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:22:16,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:22:16,924 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:22:16,924 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:22:16,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:22:16,925 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:22:16,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:22:16,925 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a [2025-03-03 09:22:17,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:22:17,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:22:17,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:22:17,181 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:22:17,182 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:22:17,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor4.i [2025-03-03 09:22:18,354 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9789c51a7/1cdd6d1c5ba54c80a06664a6702b68e7/FLAG10c0ea2b9 [2025-03-03 09:22:18,542 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:22:18,543 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor4.i [2025-03-03 09:22:18,553 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9789c51a7/1cdd6d1c5ba54c80a06664a6702b68e7/FLAG10c0ea2b9 [2025-03-03 09:22:18,578 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9789c51a7/1cdd6d1c5ba54c80a06664a6702b68e7 [2025-03-03 09:22:18,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:22:18,581 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:22:18,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:22:18,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:22:18,585 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:22:18,586 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd14c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18, skipping insertion in model container [2025-03-03 09:22:18,587 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,596 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:22:18,708 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-crafted/xor4.i[1303,1316] [2025-03-03 09:22:18,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:22:18,719 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:22:18,737 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-crafted/xor4.i[1303,1316] [2025-03-03 09:22:18,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:22:18,748 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:22:18,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18 WrapperNode [2025-03-03 09:22:18,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:22:18,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:22:18,750 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:22:18,750 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:22:18,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,760 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,773 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 70 [2025-03-03 09:22:18,773 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:22:18,775 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:22:18,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:22:18,775 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:22:18,781 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,786 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,800 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2025-03-03 09:22:18,800 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,801 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,806 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,809 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:22:18,816 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:22:18,816 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:22:18,816 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:22:18,816 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (1/1) ... [2025-03-03 09:22:18,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:22:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:18,841 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) [2025-03-03 09:22:18,843 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 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:22:18,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-03 09:22:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2025-03-03 09:22:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2025-03-03 09:22:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:22:18,909 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:22:18,910 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:22:19,005 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L31: call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset; [2025-03-03 09:22:19,040 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2025-03-03 09:22:19,040 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:22:19,052 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:22:19,052 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:22:19,053 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:22:19 BoogieIcfgContainer [2025-03-03 09:22:19,053 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:22:19,055 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:22:19,055 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:22:19,058 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:22:19,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:22:18" (1/3) ... [2025-03-03 09:22:19,060 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110258ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:22:19, skipping insertion in model container [2025-03-03 09:22:19,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:22:18" (2/3) ... [2025-03-03 09:22:19,060 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110258ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:22:19, skipping insertion in model container [2025-03-03 09:22:19,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:22:19" (3/3) ... [2025-03-03 09:22:19,061 INFO L128 eAbstractionObserver]: Analyzing ICFG xor4.i [2025-03-03 09:22:19,071 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:22:19,073 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG xor4.i that has 2 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 09:22:19,110 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:22:19,117 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;@2b74c32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:22:19,117 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:22:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 09:22:19,126 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:19,126 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:19,127 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:19,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:19,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1065639596, now seen corresponding path program 1 times [2025-03-03 09:22:19,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:19,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341313508] [2025-03-03 09:22:19,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:22:19,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:19,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 09:22:19,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 09:22:19,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:22:19,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:22:19,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:19,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341313508] [2025-03-03 09:22:19,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341313508] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:22:19,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:22:19,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:22:19,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764131534] [2025-03-03 09:22:19,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:22:19,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:22:19,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:19,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:22:19,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:22:19,367 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 09:22:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:19,390 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2025-03-03 09:22:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:22:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2025-03-03 09:22:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:19,397 INFO L225 Difference]: With dead ends: 50 [2025-03-03 09:22:19,398 INFO L226 Difference]: Without dead ends: 23 [2025-03-03 09:22:19,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:22:19,402 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:19,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-03 09:22:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-03-03 09:22:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2025-03-03 09:22:19,425 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 24 [2025-03-03 09:22:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:19,425 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2025-03-03 09:22:19,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-03 09:22:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2025-03-03 09:22:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 09:22:19,426 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:19,427 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:19,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:22:19,427 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:19,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:19,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1183839165, now seen corresponding path program 1 times [2025-03-03 09:22:19,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:19,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135990726] [2025-03-03 09:22:19,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:22:19,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:19,442 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 09:22:19,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 09:22:19,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:22:19,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:22:19,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135990726] [2025-03-03 09:22:19,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135990726] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691612349] [2025-03-03 09:22:19,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:22:19,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:19,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:19,567 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) [2025-03-03 09:22:19,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:22:19,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 09:22:19,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 09:22:19,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:22:19,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:19,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 09:22:19,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-03 09:22:19,672 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:22:19,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691612349] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:22:19,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:22:19,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 09:22:19,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915378309] [2025-03-03 09:22:19,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:22:19,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:22:19,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:19,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:22:19,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:22:19,674 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 09:22:19,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:19,686 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2025-03-03 09:22:19,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:22:19,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-03-03 09:22:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:19,687 INFO L225 Difference]: With dead ends: 47 [2025-03-03 09:22:19,687 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 09:22:19,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:22:19,689 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:19,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 09:22:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2025-03-03 09:22:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2025-03-03 09:22:19,696 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 25 [2025-03-03 09:22:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:19,696 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2025-03-03 09:22:19,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 09:22:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2025-03-03 09:22:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-03 09:22:19,698 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:19,698 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:19,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 09:22:19,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:19,899 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:19,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1777023229, now seen corresponding path program 1 times [2025-03-03 09:22:19,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:19,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263533516] [2025-03-03 09:22:19,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:22:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:19,920 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-03 09:22:19,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 09:22:19,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:22:19,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 09:22:20,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:20,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263533516] [2025-03-03 09:22:20,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263533516] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:20,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631365640] [2025-03-03 09:22:20,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:22:20,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:20,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:20,006 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) [2025-03-03 09:22:20,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:22:20,052 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-03 09:22:20,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 09:22:20,076 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:22:20,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:20,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 09:22:20,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 09:22:20,091 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:22:20,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631365640] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:22:20,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:22:20,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 09:22:20,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196669838] [2025-03-03 09:22:20,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:22:20,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:22:20,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:20,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:22:20,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:22:20,092 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 09:22:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:20,101 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2025-03-03 09:22:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:22:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2025-03-03 09:22:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:20,104 INFO L225 Difference]: With dead ends: 40 [2025-03-03 09:22:20,104 INFO L226 Difference]: Without dead ends: 25 [2025-03-03 09:22:20,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:22:20,105 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:20,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-03 09:22:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-03 09:22:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2025-03-03 09:22:20,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 34 [2025-03-03 09:22:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:20,112 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2025-03-03 09:22:20,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 09:22:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2025-03-03 09:22:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 09:22:20,113 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:20,113 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:20,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 09:22:20,315 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,SelfDestructingSolverStorable2 [2025-03-03 09:22:20,315 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:20,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1428992780, now seen corresponding path program 1 times [2025-03-03 09:22:20,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:20,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177910962] [2025-03-03 09:22:20,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:22:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:20,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 09:22:20,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:22:20,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:22:20,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-03 09:22:20,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177910962] [2025-03-03 09:22:20,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177910962] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653910035] [2025-03-03 09:22:20,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:22:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:20,398 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) [2025-03-03 09:22:20,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:22:20,436 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-03 09:22:20,458 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 09:22:20,458 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:22:20,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:20,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:22:20,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-03 09:22:20,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-03 09:22:20,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653910035] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:20,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:20,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-03 09:22:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569962816] [2025-03-03 09:22:20,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:20,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 09:22:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:20,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 09:22:20,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:22:20,521 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:22:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:20,542 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2025-03-03 09:22:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:22:20,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 35 [2025-03-03 09:22:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:20,543 INFO L225 Difference]: With dead ends: 49 [2025-03-03 09:22:20,543 INFO L226 Difference]: Without dead ends: 28 [2025-03-03 09:22:20,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:22:20,544 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:20,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-03 09:22:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-03 09:22:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2025-03-03 09:22:20,551 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 35 [2025-03-03 09:22:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:20,551 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2025-03-03 09:22:20,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:22:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2025-03-03 09:22:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 09:22:20,552 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:20,552 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:20,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 09:22:20,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:20,752 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:20,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1206191459, now seen corresponding path program 2 times [2025-03-03 09:22:20,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:20,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876909301] [2025-03-03 09:22:20,753 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:22:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:20,767 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-03 09:22:20,781 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 09:22:20,781 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:22:20,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 09:22:20,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:20,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876909301] [2025-03-03 09:22:20,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876909301] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:20,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394233282] [2025-03-03 09:22:20,845 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:22:20,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:20,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:20,850 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) [2025-03-03 09:22:20,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:22:20,892 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-03 09:22:20,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 09:22:20,941 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:22:20,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:20,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:22:20,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-03 09:22:20,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-03 09:22:21,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394233282] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:21,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:21,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2025-03-03 09:22:21,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027813850] [2025-03-03 09:22:21,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:21,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:22:21,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:21,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:22:21,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:22:21,059 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:22:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:21,095 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2025-03-03 09:22:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 09:22:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 38 [2025-03-03 09:22:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:21,096 INFO L225 Difference]: With dead ends: 66 [2025-03-03 09:22:21,096 INFO L226 Difference]: Without dead ends: 45 [2025-03-03 09:22:21,096 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:22:21,097 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:21,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 169 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:21,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-03 09:22:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2025-03-03 09:22:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2025-03-03 09:22:21,102 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 38 [2025-03-03 09:22:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:21,102 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2025-03-03 09:22:21,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:22:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2025-03-03 09:22:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-03 09:22:21,103 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:21,103 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:21,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 09:22:21,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:21,308 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:21,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2105824583, now seen corresponding path program 3 times [2025-03-03 09:22:21,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:21,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790938171] [2025-03-03 09:22:21,309 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:22:21,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:21,328 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 6 equivalence classes. [2025-03-03 09:22:21,340 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 32 of 53 statements. [2025-03-03 09:22:21,340 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:22:21,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-03 09:22:21,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:21,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790938171] [2025-03-03 09:22:21,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790938171] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:21,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737594809] [2025-03-03 09:22:21,397 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:22:21,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:21,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:21,399 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) [2025-03-03 09:22:21,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:22:21,452 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 53 statements into 6 equivalence classes. [2025-03-03 09:22:21,473 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 32 of 53 statements. [2025-03-03 09:22:21,473 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:22:21,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:21,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:22:21,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-03 09:22:21,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-03 09:22:21,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737594809] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:21,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:21,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-03 09:22:21,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423550168] [2025-03-03 09:22:21,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:21,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 09:22:21,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:21,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 09:22:21,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:22:21,513 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:22:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:21,532 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2025-03-03 09:22:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:22:21,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2025-03-03 09:22:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:21,533 INFO L225 Difference]: With dead ends: 64 [2025-03-03 09:22:21,533 INFO L226 Difference]: Without dead ends: 43 [2025-03-03 09:22:21,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:22:21,534 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:21,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:21,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-03 09:22:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2025-03-03 09:22:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2025-03-03 09:22:21,540 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 53 [2025-03-03 09:22:21,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:21,540 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2025-03-03 09:22:21,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:22:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2025-03-03 09:22:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-03 09:22:21,541 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:21,541 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:21,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 09:22:21,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:21,741 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:21,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:21,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1143402124, now seen corresponding path program 4 times [2025-03-03 09:22:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:21,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087191997] [2025-03-03 09:22:21,745 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:22:21,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:21,758 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-03-03 09:22:21,769 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:22:21,770 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:22:21,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-03-03 09:22:21,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087191997] [2025-03-03 09:22:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087191997] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397403286] [2025-03-03 09:22:21,829 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:22:21,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:21,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:21,831 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) [2025-03-03 09:22:21,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 09:22:21,886 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 56 statements into 2 equivalence classes. [2025-03-03 09:22:21,933 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:22:21,933 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:22:21,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:21,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 09:22:21,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2025-03-03 09:22:21,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-03-03 09:22:22,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397403286] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:22,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:22,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-03 09:22:22,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468038091] [2025-03-03 09:22:22,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:22,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 09:22:22,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:22,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 09:22:22,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-03 09:22:22,005 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 09:22:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:22,044 INFO L93 Difference]: Finished difference Result 96 states and 133 transitions. [2025-03-03 09:22:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 09:22:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2025-03-03 09:22:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:22,046 INFO L225 Difference]: With dead ends: 96 [2025-03-03 09:22:22,047 INFO L226 Difference]: Without dead ends: 67 [2025-03-03 09:22:22,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-03 09:22:22,047 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:22,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-03 09:22:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2025-03-03 09:22:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3387096774193548) internal successors, (83), 62 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:22,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2025-03-03 09:22:22,054 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 56 [2025-03-03 09:22:22,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:22,054 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2025-03-03 09:22:22,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 09:22:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2025-03-03 09:22:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-03 09:22:22,055 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:22,055 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:22,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 09:22:22,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:22,256 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:22,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -534687092, now seen corresponding path program 5 times [2025-03-03 09:22:22,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:22,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021635660] [2025-03-03 09:22:22,257 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:22:22,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:22,270 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 92 statements into 14 equivalence classes. [2025-03-03 09:22:22,301 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 81 of 92 statements. [2025-03-03 09:22:22,301 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-03 09:22:22,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 123 proven. 174 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2025-03-03 09:22:22,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:22,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021635660] [2025-03-03 09:22:22,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021635660] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:22,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968196345] [2025-03-03 09:22:22,450 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:22:22,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:22,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:22,452 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) [2025-03-03 09:22:22,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 09:22:22,516 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 92 statements into 14 equivalence classes. [2025-03-03 09:22:22,743 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 81 of 92 statements. [2025-03-03 09:22:22,743 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-03 09:22:22,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:22,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:22:22,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2025-03-03 09:22:22,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2025-03-03 09:22:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968196345] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:22,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-03 09:22:22,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81018642] [2025-03-03 09:22:22,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:22,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 09:22:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:22,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 09:22:22,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:22:22,893 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:22:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:22,950 INFO L93 Difference]: Finished difference Result 168 states and 245 transitions. [2025-03-03 09:22:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 09:22:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 92 [2025-03-03 09:22:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:22,951 INFO L225 Difference]: With dead ends: 168 [2025-03-03 09:22:22,951 INFO L226 Difference]: Without dead ends: 115 [2025-03-03 09:22:22,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:22:22,952 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 172 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:22,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 212 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-03 09:22:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2025-03-03 09:22:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4090909090909092) internal successors, (155), 110 states have internal predecessors, (155), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2025-03-03 09:22:22,963 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 92 [2025-03-03 09:22:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:22,965 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2025-03-03 09:22:22,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:22:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2025-03-03 09:22:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2025-03-03 09:22:22,967 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:22,967 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:22,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 09:22:23,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:23,170 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:23,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1386997108, now seen corresponding path program 6 times [2025-03-03 09:22:23,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:23,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310136856] [2025-03-03 09:22:23,170 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:22:23,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:23,186 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 164 statements into 30 equivalence classes. [2025-03-03 09:22:23,209 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 52 of 164 statements. [2025-03-03 09:22:23,209 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 09:22:23,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2786 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-03 09:22:23,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:23,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310136856] [2025-03-03 09:22:23,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310136856] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:23,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055827032] [2025-03-03 09:22:23,276 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:22:23,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:23,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:23,279 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) [2025-03-03 09:22:23,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 09:22:23,346 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 164 statements into 30 equivalence classes. [2025-03-03 09:22:23,382 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 52 of 164 statements. [2025-03-03 09:22:23,382 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 09:22:23,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:23,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:22:23,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2786 backedges. 1240 proven. 10 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2025-03-03 09:22:23,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2786 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-03 09:22:23,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055827032] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:23,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:23,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-03 09:22:23,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818778515] [2025-03-03 09:22:23,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:23,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 09:22:23,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:23,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 09:22:23,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:22:23,475 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:22:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:23,494 INFO L93 Difference]: Finished difference Result 214 states and 308 transitions. [2025-03-03 09:22:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 09:22:23,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 164 [2025-03-03 09:22:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:23,496 INFO L225 Difference]: With dead ends: 214 [2025-03-03 09:22:23,496 INFO L226 Difference]: Without dead ends: 121 [2025-03-03 09:22:23,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:22:23,497 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:23,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-03-03 09:22:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2025-03-03 09:22:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.3879310344827587) internal successors, (161), 116 states have internal predecessors, (161), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2025-03-03 09:22:23,503 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 164 [2025-03-03 09:22:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:23,504 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2025-03-03 09:22:23,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:22:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2025-03-03 09:22:23,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2025-03-03 09:22:23,505 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:23,505 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:23,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 09:22:23,706 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,SelfDestructingSolverStorable8 [2025-03-03 09:22:23,706 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:23,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:23,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2071325548, now seen corresponding path program 7 times [2025-03-03 09:22:23,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:23,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838949008] [2025-03-03 09:22:23,707 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:22:23,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:23,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 170 statements into 1 equivalence classes. [2025-03-03 09:22:23,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 170 of 170 statements. [2025-03-03 09:22:23,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:22:23,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2831 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-03 09:22:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838949008] [2025-03-03 09:22:24,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838949008] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986996896] [2025-03-03 09:22:24,049 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:22:24,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:24,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:24,051 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) [2025-03-03 09:22:24,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 09:22:24,137 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 170 statements into 1 equivalence classes. [2025-03-03 09:22:24,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 170 of 170 statements. [2025-03-03 09:22:24,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:22:24,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:24,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 09:22:24,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2831 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-03 09:22:24,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2831 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-03 09:22:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986996896] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:24,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:24,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-03 09:22:24,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406024749] [2025-03-03 09:22:24,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:24,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 09:22:24,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:24,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 09:22:24,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 09:22:24,435 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:22:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:24,463 INFO L93 Difference]: Finished difference Result 241 states and 344 transitions. [2025-03-03 09:22:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 09:22:24,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 170 [2025-03-03 09:22:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:24,465 INFO L225 Difference]: With dead ends: 241 [2025-03-03 09:22:24,465 INFO L226 Difference]: Without dead ends: 133 [2025-03-03 09:22:24,466 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 09:22:24,466 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:24,466 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 152 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2025-03-03 09:22:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2025-03-03 09:22:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.3515625) internal successors, (173), 128 states have internal predecessors, (173), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 179 transitions. [2025-03-03 09:22:24,479 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 179 transitions. Word has length 170 [2025-03-03 09:22:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:24,480 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 179 transitions. [2025-03-03 09:22:24,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:22:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 179 transitions. [2025-03-03 09:22:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2025-03-03 09:22:24,481 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:24,482 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 22, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:24,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 09:22:24,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 09:22:24,686 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:24,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:24,687 INFO L85 PathProgramCache]: Analyzing trace with hash -478310356, now seen corresponding path program 8 times [2025-03-03 09:22:24,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:24,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747406607] [2025-03-03 09:22:24,687 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:22:24,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:24,712 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 182 statements into 2 equivalence classes. [2025-03-03 09:22:24,735 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 182 of 182 statements. [2025-03-03 09:22:24,735 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:22:24,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-03 09:22:25,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:25,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747406607] [2025-03-03 09:22:25,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747406607] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:25,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072103167] [2025-03-03 09:22:25,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:22:25,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:25,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:25,400 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) [2025-03-03 09:22:25,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 09:22:25,491 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 182 statements into 2 equivalence classes. [2025-03-03 09:22:25,573 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 182 of 182 statements. [2025-03-03 09:22:25,573 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:22:25,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:25,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 09:22:25,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-03 09:22:25,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-03 09:22:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072103167] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:26,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:26,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-03-03 09:22:26,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604948812] [2025-03-03 09:22:26,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:26,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 09:22:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:26,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 09:22:26,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 09:22:26,261 INFO L87 Difference]: Start difference. First operand 133 states and 179 transitions. Second operand has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:22:26,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:26,306 INFO L93 Difference]: Finished difference Result 265 states and 380 transitions. [2025-03-03 09:22:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-03 09:22:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 182 [2025-03-03 09:22:26,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:26,307 INFO L225 Difference]: With dead ends: 265 [2025-03-03 09:22:26,307 INFO L226 Difference]: Without dead ends: 157 [2025-03-03 09:22:26,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 09:22:26,309 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:26,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 152 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-03-03 09:22:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2025-03-03 09:22:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.2960526315789473) internal successors, (197), 152 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2025-03-03 09:22:26,316 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 182 [2025-03-03 09:22:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:26,316 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2025-03-03 09:22:26,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-03 09:22:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2025-03-03 09:22:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2025-03-03 09:22:26,317 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:26,317 INFO L218 NwaCegarLoop]: trace histogram [46, 42, 42, 42, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:26,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 09:22:26,522 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,SelfDestructingSolverStorable10 [2025-03-03 09:22:26,522 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:26,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:26,523 INFO L85 PathProgramCache]: Analyzing trace with hash -469141076, now seen corresponding path program 9 times [2025-03-03 09:22:26,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:26,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689085146] [2025-03-03 09:22:26,523 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:22:26,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:26,573 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 206 statements into 30 equivalence classes. [2025-03-03 09:22:26,628 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 73 of 206 statements. [2025-03-03 09:22:26,628 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 09:22:26,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2025-03-03 09:22:26,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:26,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689085146] [2025-03-03 09:22:26,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689085146] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:26,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471642678] [2025-03-03 09:22:26,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:22:26,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:26,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:26,800 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) [2025-03-03 09:22:26,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 09:22:26,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 206 statements into 30 equivalence classes. [2025-03-03 09:22:27,133 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 73 of 206 statements. [2025-03-03 09:22:27,133 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 09:22:27,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:27,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 09:22:27,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 1240 proven. 55 refuted. 0 times theorem prover too weak. 2562 trivial. 0 not checked. [2025-03-03 09:22:27,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2025-03-03 09:22:27,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471642678] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:27,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:27,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-03 09:22:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160781741] [2025-03-03 09:22:27,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:27,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 09:22:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:27,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 09:22:27,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 09:22:27,381 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:22:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:27,410 INFO L93 Difference]: Finished difference Result 262 states and 362 transitions. [2025-03-03 09:22:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 09:22:27,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 206 [2025-03-03 09:22:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:27,412 INFO L225 Difference]: With dead ends: 262 [2025-03-03 09:22:27,412 INFO L226 Difference]: Without dead ends: 169 [2025-03-03 09:22:27,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 09:22:27,413 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:27,413 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:22:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-03-03 09:22:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2025-03-03 09:22:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.274390243902439) internal successors, (209), 164 states have internal predecessors, (209), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 215 transitions. [2025-03-03 09:22:27,419 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 215 transitions. Word has length 206 [2025-03-03 09:22:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:27,419 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 215 transitions. [2025-03-03 09:22:27,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:22:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 215 transitions. [2025-03-03 09:22:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2025-03-03 09:22:27,421 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:27,421 INFO L218 NwaCegarLoop]: trace histogram [46, 42, 42, 42, 22, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:27,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 09:22:27,621 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,SelfDestructingSolverStorable11 [2025-03-03 09:22:27,622 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:27,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash 91177836, now seen corresponding path program 10 times [2025-03-03 09:22:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:27,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731353934] [2025-03-03 09:22:27,623 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:22:27,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:27,661 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 218 statements into 2 equivalence classes. [2025-03-03 09:22:27,711 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 218 of 218 statements. [2025-03-03 09:22:27,711 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:22:27,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2025-03-03 09:22:28,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:28,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731353934] [2025-03-03 09:22:28,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731353934] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:28,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523141413] [2025-03-03 09:22:28,174 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:22:28,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:28,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:28,176 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) [2025-03-03 09:22:28,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 09:22:28,315 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 218 statements into 2 equivalence classes. [2025-03-03 09:22:28,426 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 218 of 218 statements. [2025-03-03 09:22:28,426 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:22:28,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:28,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 09:22:28,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:22:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2025-03-03 09:22:28,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:22:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2025-03-03 09:22:28,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523141413] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:22:28,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:22:28,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2025-03-03 09:22:28,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908366300] [2025-03-03 09:22:28,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:22:28,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 09:22:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:22:28,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 09:22:28,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-03 09:22:28,786 INFO L87 Difference]: Start difference. First operand 169 states and 215 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 09:22:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:22:28,924 INFO L93 Difference]: Finished difference Result 384 states and 541 transitions. [2025-03-03 09:22:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-03 09:22:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 218 [2025-03-03 09:22:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:22:28,926 INFO L225 Difference]: With dead ends: 384 [2025-03-03 09:22:28,926 INFO L226 Difference]: Without dead ends: 265 [2025-03-03 09:22:28,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-03 09:22:28,928 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 598 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:22:28,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 236 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:22:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2025-03-03 09:22:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2025-03-03 09:22:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.3576923076923078) internal successors, (353), 260 states have internal predecessors, (353), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 09:22:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 359 transitions. [2025-03-03 09:22:28,938 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 359 transitions. Word has length 218 [2025-03-03 09:22:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:22:28,938 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 359 transitions. [2025-03-03 09:22:28,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 09:22:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 359 transitions. [2025-03-03 09:22:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2025-03-03 09:22:28,941 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:22:28,941 INFO L218 NwaCegarLoop]: trace histogram [90, 90, 90, 46, 22, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:22:28,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 09:22:29,146 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,SelfDestructingSolverStorable12 [2025-03-03 09:22:29,146 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:22:29,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:22:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash 455414636, now seen corresponding path program 11 times [2025-03-03 09:22:29,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:22:29,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220796296] [2025-03-03 09:22:29,147 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:22:29,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:22:29,178 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 362 statements into 62 equivalence classes. [2025-03-03 09:22:29,536 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) and asserted 351 of 362 statements. [2025-03-03 09:22:29,536 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2025-03-03 09:22:29,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:22:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13631 backedges. 2763 proven. 4098 refuted. 0 times theorem prover too weak. 6770 trivial. 0 not checked. [2025-03-03 09:22:30,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:22:30,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220796296] [2025-03-03 09:22:30,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220796296] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:22:30,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292664137] [2025-03-03 09:22:30,583 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:22:30,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:22:30,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:22:30,584 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) [2025-03-03 09:22:30,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 09:22:30,757 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 362 statements into 62 equivalence classes.