./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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-fpi/brs5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:53:16,528 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:53:16,585 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:53:16,589 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:53:16,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:53:16,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:53:16,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:53:16,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:53:16,607 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:53:16,607 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:53:16,608 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:53:16,608 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:53:16,608 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:53:16,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:53:16,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:53:16,609 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:53:16,610 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:53:16,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:53:16,610 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:53:16,610 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 -> 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 [2025-03-16 13:53:16,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:53:16,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:53:16,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:53:16,898 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:53:16,899 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:53:16,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs5.c [2025-03-16 13:53:18,082 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be8715d55/f567712c7aad4d32b6e9422b15440a09/FLAG06e685a62 [2025-03-16 13:53:18,287 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:53:18,288 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c [2025-03-16 13:53:18,302 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be8715d55/f567712c7aad4d32b6e9422b15440a09/FLAG06e685a62 [2025-03-16 13:53:18,635 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be8715d55/f567712c7aad4d32b6e9422b15440a09 [2025-03-16 13:53:18,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:53:18,637 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:53:18,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:53:18,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:53:18,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:53:18,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a864e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18, skipping insertion in model container [2025-03-16 13:53:18,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,651 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:53:18,749 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c[587,600] [2025-03-16 13:53:18,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:53:18,775 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:53:18,782 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c[587,600] [2025-03-16 13:53:18,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:53:18,804 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:53:18,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18 WrapperNode [2025-03-16 13:53:18,805 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:53:18,806 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:53:18,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:53:18,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:53:18,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,816 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,831 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2025-03-16 13:53:18,833 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:53:18,833 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:53:18,834 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:53:18,834 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:53:18,839 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,842 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,858 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 4, 7, 3]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 0, 7, 0]. The 4 writes are split as follows [0, 2, 0, 2]. [2025-03-16 13:53:18,859 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,859 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,867 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,867 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,868 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,871 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,872 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:53:18,873 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:53:18,873 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:53:18,873 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:53:18,874 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (1/1) ... [2025-03-16 13:53:18,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:53:18,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:18,901 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) [2025-03-16 13:53:18,903 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 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:53:18,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-16 13:53:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:53:18,971 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:53:18,972 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:53:19,074 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L28: call ULTIMATE.dealloc(main_~#sum~0#1.base, main_~#sum~0#1.offset);havoc main_~#sum~0#1.base, main_~#sum~0#1.offset; [2025-03-16 13:53:19,080 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-16 13:53:19,080 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:53:19,085 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:53:19,085 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:53:19,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:53:19 BoogieIcfgContainer [2025-03-16 13:53:19,086 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:53:19,087 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:53:19,087 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:53:19,090 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:53:19,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:53:18" (1/3) ... [2025-03-16 13:53:19,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48608543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:53:19, skipping insertion in model container [2025-03-16 13:53:19,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:53:18" (2/3) ... [2025-03-16 13:53:19,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48608543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:53:19, skipping insertion in model container [2025-03-16 13:53:19,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:53:19" (3/3) ... [2025-03-16 13:53:19,091 INFO L128 eAbstractionObserver]: Analyzing ICFG brs5.c [2025-03-16 13:53:19,101 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:53:19,102 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG brs5.c that has 1 procedures, 17 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 13:53:19,141 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:53:19,147 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;@733ce133, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:53:19,148 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:53:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 13:53:19,152 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:19,153 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:19,153 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:19,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1829669241, now seen corresponding path program 1 times [2025-03-16 13:53:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136467733] [2025-03-16 13:53:19,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:53:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:19,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:53:19,222 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:53:19,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:53:19,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:19,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:19,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136467733] [2025-03-16 13:53:19,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136467733] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:53:19,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:53:19,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:53:19,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988389576] [2025-03-16 13:53:19,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:53:19,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 13:53:19,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:19,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 13:53:19,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:53:19,283 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:19,289 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2025-03-16 13:53:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 13:53:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 13:53:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:19,294 INFO L225 Difference]: With dead ends: 31 [2025-03-16 13:53:19,294 INFO L226 Difference]: Without dead ends: 13 [2025-03-16 13:53:19,295 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:53:19,297 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:19,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:53:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-16 13:53:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-16 13:53:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2025-03-16 13:53:19,314 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2025-03-16 13:53:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:19,314 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2025-03-16 13:53:19,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2025-03-16 13:53:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 13:53:19,315 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:19,315 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:19,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:53:19,315 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:19,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:19,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1858298392, now seen corresponding path program 1 times [2025-03-16 13:53:19,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:19,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987503660] [2025-03-16 13:53:19,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:53:19,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:19,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:53:19,332 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:53:19,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:53:19,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:19,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:19,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987503660] [2025-03-16 13:53:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987503660] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:53:19,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:53:19,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 13:53:19,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078261224] [2025-03-16 13:53:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:53:19,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:53:19,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:19,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:53:19,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:53:19,408 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:19,457 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2025-03-16 13:53:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:53:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 13:53:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:19,458 INFO L225 Difference]: With dead ends: 28 [2025-03-16 13:53:19,458 INFO L226 Difference]: Without dead ends: 19 [2025-03-16 13:53:19,458 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:53:19,458 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:19,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 10 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:53:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-16 13:53:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2025-03-16 13:53:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2025-03-16 13:53:19,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2025-03-16 13:53:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:19,461 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2025-03-16 13:53:19,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2025-03-16 13:53:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 13:53:19,462 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:19,462 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:19,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:53:19,462 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:19,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:19,462 INFO L85 PathProgramCache]: Analyzing trace with hash 51562295, now seen corresponding path program 1 times [2025-03-16 13:53:19,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:19,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582078430] [2025-03-16 13:53:19,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:53:19,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:19,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 13:53:19,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 13:53:19,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:53:19,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:53:19,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:19,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582078430] [2025-03-16 13:53:19,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582078430] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:53:19,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:53:19,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 13:53:19,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989054108] [2025-03-16 13:53:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:53:19,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 13:53:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:19,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 13:53:19,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:53:19,736 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:19,773 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2025-03-16 13:53:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 13:53:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-16 13:53:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:19,773 INFO L225 Difference]: With dead ends: 23 [2025-03-16 13:53:19,773 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 13:53:19,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:53:19,774 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:19,774 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:53:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 13:53:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2025-03-16 13:53:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-03-16 13:53:19,776 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2025-03-16 13:53:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:19,776 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-03-16 13:53:19,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-03-16 13:53:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 13:53:19,777 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:19,777 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:19,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 13:53:19,777 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:19,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1386700371, now seen corresponding path program 1 times [2025-03-16 13:53:19,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:19,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77808782] [2025-03-16 13:53:19,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:53:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:19,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:53:19,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:53:19,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:53:19,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:19,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:19,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77808782] [2025-03-16 13:53:19,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77808782] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:19,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463001230] [2025-03-16 13:53:19,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:53:19,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:19,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:19,881 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) [2025-03-16 13:53:19,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:53:19,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 13:53:19,941 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:53:19,941 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:53:19,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:19,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:53:19,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:20,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:20,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463001230] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:20,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:20,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-03-16 13:53:20,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814813606] [2025-03-16 13:53:20,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:20,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 13:53:20,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:20,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 13:53:20,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-16 13:53:20,036 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:20,114 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2025-03-16 13:53:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 13:53:20,115 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-16 13:53:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:20,115 INFO L225 Difference]: With dead ends: 38 [2025-03-16 13:53:20,115 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 13:53:20,116 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:53:20,117 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:20,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:53:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 13:53:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2025-03-16 13:53:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2025-03-16 13:53:20,122 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2025-03-16 13:53:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:20,122 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2025-03-16 13:53:20,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2025-03-16 13:53:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-16 13:53:20,123 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:20,123 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:20,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 13:53:20,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:20,324 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:20,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:20,325 INFO L85 PathProgramCache]: Analyzing trace with hash 434912664, now seen corresponding path program 1 times [2025-03-16 13:53:20,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:20,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606106407] [2025-03-16 13:53:20,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:53:20,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:20,332 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-16 13:53:20,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-16 13:53:20,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:53:20,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606106407] [2025-03-16 13:53:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606106407] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865194403] [2025-03-16 13:53:20,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:53:20,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:20,826 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) [2025-03-16 13:53:20,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:53:20,863 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-16 13:53:20,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-16 13:53:20,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:53:20,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:20,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 13:53:20,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:20,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:53:20,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:53:21,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2025-03-16 13:53:21,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:53:21,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:53:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:21,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:21,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-16 13:53:21,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2025-03-16 13:53:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:21,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865194403] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:21,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:21,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2025-03-16 13:53:21,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111425113] [2025-03-16 13:53:21,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:21,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:53:21,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:21,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:53:21,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:53:21,301 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:21,460 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2025-03-16 13:53:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 13:53:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-03-16 13:53:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:21,461 INFO L225 Difference]: With dead ends: 44 [2025-03-16 13:53:21,461 INFO L226 Difference]: Without dead ends: 27 [2025-03-16 13:53:21,462 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2025-03-16 13:53:21,462 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:21,462 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:53:21,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-16 13:53:21,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2025-03-16 13:53:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2025-03-16 13:53:21,466 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2025-03-16 13:53:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:21,467 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2025-03-16 13:53:21,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2025-03-16 13:53:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:53:21,467 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:21,467 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:21,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 13:53:21,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:21,668 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:21,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1313897556, now seen corresponding path program 2 times [2025-03-16 13:53:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:21,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469287828] [2025-03-16 13:53:21,668 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:53:21,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:21,675 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-16 13:53:21,682 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:53:21,683 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:53:21,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:21,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:21,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469287828] [2025-03-16 13:53:21,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469287828] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:21,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291556498] [2025-03-16 13:53:21,764 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:53:21,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:21,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:21,766 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) [2025-03-16 13:53:21,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:53:21,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-16 13:53:21,818 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:53:21,819 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:53:21,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:21,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:53:21,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:21,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:21,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291556498] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:21,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:21,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2025-03-16 13:53:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692377317] [2025-03-16 13:53:21,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:21,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 13:53:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:21,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 13:53:21,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-03-16 13:53:21,926 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:22,013 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2025-03-16 13:53:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 13:53:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:53:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:22,014 INFO L225 Difference]: With dead ends: 56 [2025-03-16 13:53:22,014 INFO L226 Difference]: Without dead ends: 34 [2025-03-16 13:53:22,014 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:53:22,015 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:22,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:53:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-16 13:53:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2025-03-16 13:53:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2025-03-16 13:53:22,021 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2025-03-16 13:53:22,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:22,021 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2025-03-16 13:53:22,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:22,021 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2025-03-16 13:53:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 13:53:22,022 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:22,022 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:22,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 13:53:22,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:22,223 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:22,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:22,223 INFO L85 PathProgramCache]: Analyzing trace with hash 423314263, now seen corresponding path program 3 times [2025-03-16 13:53:22,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:22,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092346687] [2025-03-16 13:53:22,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:53:22,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:22,230 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 4 equivalence classes. [2025-03-16 13:53:22,277 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 13:53:22,278 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:53:22,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:53:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092346687] [2025-03-16 13:53:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092346687] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637420832] [2025-03-16 13:53:23,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:53:23,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:23,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:23,113 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) [2025-03-16 13:53:23,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:53:23,152 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 4 equivalence classes. [2025-03-16 13:53:23,168 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 13:53:23,169 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:53:23,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:23,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-16 13:53:23,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:23,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:53:23,286 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2025-03-16 13:53:23,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2025-03-16 13:53:23,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:53:23,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2025-03-16 13:53:23,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2025-03-16 13:53:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:53:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:53:23,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:53:23,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 26 [2025-03-16 13:53:23,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:53:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:23,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:24,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2025-03-16 13:53:24,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2025-03-16 13:53:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:24,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637420832] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:24,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:24,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2025-03-16 13:53:24,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969836595] [2025-03-16 13:53:24,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:24,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-16 13:53:24,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:24,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-16 13:53:24,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1771, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 13:53:24,156 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:26,135 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2025-03-16 13:53:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-16 13:53:26,135 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-03-16 13:53:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:26,137 INFO L225 Difference]: With dead ends: 82 [2025-03-16 13:53:26,137 INFO L226 Difference]: Without dead ends: 70 [2025-03-16 13:53:26,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1380, Invalid=6630, Unknown=0, NotChecked=0, Total=8010 [2025-03-16 13:53:26,140 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 163 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:26,140 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 64 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:53:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-16 13:53:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2025-03-16 13:53:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2025-03-16 13:53:26,153 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 26 [2025-03-16 13:53:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:26,153 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2025-03-16 13:53:26,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:26,153 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2025-03-16 13:53:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-16 13:53:26,154 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:26,154 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:26,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:53:26,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:26,355 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:26,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:26,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1050489229, now seen corresponding path program 4 times [2025-03-16 13:53:26,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:26,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250294963] [2025-03-16 13:53:26,355 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:53:26,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:26,366 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-16 13:53:26,376 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 26 of 29 statements. [2025-03-16 13:53:26,376 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:53:26,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:26,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250294963] [2025-03-16 13:53:26,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250294963] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16750414] [2025-03-16 13:53:26,554 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:53:26,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:26,556 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) [2025-03-16 13:53:26,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:53:26,597 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-16 13:53:26,619 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 26 of 29 statements. [2025-03-16 13:53:26,619 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:53:26,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:26,620 WARN L254 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-16 13:53:26,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:26,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-03-16 13:53:26,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2025-03-16 13:53:26,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2025-03-16 13:53:26,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:53:26,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 21 [2025-03-16 13:53:26,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 30 [2025-03-16 13:53:27,171 INFO L349 Elim1Store]: treesize reduction 26, result has 70.1 percent of original size [2025-03-16 13:53:27,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 92 [2025-03-16 13:53:27,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 15 [2025-03-16 13:53:27,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:53:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:27,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:27,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16750414] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:27,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:27,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 48 [2025-03-16 13:53:27,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887534489] [2025-03-16 13:53:27,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:27,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-16 13:53:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:27,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-16 13:53:27,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 13:53:27,932 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 48 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:37,452 INFO L93 Difference]: Finished difference Result 319 states and 400 transitions. [2025-03-16 13:53:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2025-03-16 13:53:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 48 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-16 13:53:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:37,454 INFO L225 Difference]: With dead ends: 319 [2025-03-16 13:53:37,454 INFO L226 Difference]: Without dead ends: 297 [2025-03-16 13:53:37,462 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18163 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=6384, Invalid=42236, Unknown=0, NotChecked=0, Total=48620 [2025-03-16 13:53:37,462 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 320 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:37,462 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 148 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-16 13:53:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2025-03-16 13:53:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 221. [2025-03-16 13:53:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1863636363636363) internal successors, (261), 220 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2025-03-16 13:53:37,505 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 29 [2025-03-16 13:53:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:37,505 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2025-03-16 13:53:37,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 48 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2025-03-16 13:53:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 13:53:37,506 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:37,506 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:37,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 13:53:37,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:37,707 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:37,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:37,707 INFO L85 PathProgramCache]: Analyzing trace with hash -962653298, now seen corresponding path program 5 times [2025-03-16 13:53:37,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:37,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789008119] [2025-03-16 13:53:37,707 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:53:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:37,718 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 6 equivalence classes. [2025-03-16 13:53:37,743 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 27 of 35 statements. [2025-03-16 13:53:37,743 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 13:53:37,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:53:37,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:37,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789008119] [2025-03-16 13:53:37,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789008119] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:37,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326466691] [2025-03-16 13:53:37,990 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:53:37,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:37,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:37,991 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) [2025-03-16 13:53:37,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:53:38,025 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 35 statements into 6 equivalence classes. [2025-03-16 13:53:38,038 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 27 of 35 statements. [2025-03-16 13:53:38,039 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 13:53:38,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:38,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 13:53:38,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:53:38,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 13:53:38,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326466691] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:38,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:38,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2025-03-16 13:53:38,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071232876] [2025-03-16 13:53:38,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:38,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 13:53:38,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:38,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 13:53:38,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-03-16 13:53:38,122 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:38,258 INFO L93 Difference]: Finished difference Result 368 states and 455 transitions. [2025-03-16 13:53:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:53:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-03-16 13:53:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:38,259 INFO L225 Difference]: With dead ends: 368 [2025-03-16 13:53:38,259 INFO L226 Difference]: Without dead ends: 156 [2025-03-16 13:53:38,259 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:53:38,260 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:38,260 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 34 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:53:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-03-16 13:53:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2025-03-16 13:53:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 142 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2025-03-16 13:53:38,280 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 35 [2025-03-16 13:53:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:38,281 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2025-03-16 13:53:38,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2025-03-16 13:53:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 13:53:38,281 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:38,281 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:38,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 13:53:38,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:38,483 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:38,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1529790540, now seen corresponding path program 6 times [2025-03-16 13:53:38,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:38,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136239207] [2025-03-16 13:53:38,484 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:53:38,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:38,492 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 6 equivalence classes. [2025-03-16 13:53:38,525 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 13:53:38,525 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-16 13:53:38,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:38,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:38,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136239207] [2025-03-16 13:53:38,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136239207] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:38,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681541608] [2025-03-16 13:53:38,618 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:53:38,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:38,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:38,620 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) [2025-03-16 13:53:38,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:53:38,664 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 35 statements into 6 equivalence classes. [2025-03-16 13:53:38,691 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 13:53:38,691 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-16 13:53:38,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:38,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:53:38,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:38,782 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:38,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681541608] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:38,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:38,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2025-03-16 13:53:38,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117742958] [2025-03-16 13:53:38,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:38,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 13:53:38,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:38,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 13:53:38,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:53:38,860 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:38,984 INFO L93 Difference]: Finished difference Result 253 states and 292 transitions. [2025-03-16 13:53:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:53:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-03-16 13:53:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:38,985 INFO L225 Difference]: With dead ends: 253 [2025-03-16 13:53:38,985 INFO L226 Difference]: Without dead ends: 163 [2025-03-16 13:53:38,985 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2025-03-16 13:53:38,986 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:38,986 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 27 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:53:38,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2025-03-16 13:53:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 149. [2025-03-16 13:53:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.162162162162162) internal successors, (172), 148 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2025-03-16 13:53:39,005 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 35 [2025-03-16 13:53:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:39,006 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2025-03-16 13:53:39,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2025-03-16 13:53:39,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 13:53:39,006 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:39,007 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:39,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 13:53:39,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:39,208 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:39,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:39,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1225370297, now seen corresponding path program 7 times [2025-03-16 13:53:39,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:39,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681504828] [2025-03-16 13:53:39,209 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:53:39,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:39,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 13:53:39,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:53:39,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:53:39,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:39,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:39,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681504828] [2025-03-16 13:53:39,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681504828] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:39,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096899161] [2025-03-16 13:53:39,331 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:53:39,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:39,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:39,333 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) [2025-03-16 13:53:39,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:53:39,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 13:53:39,386 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:53:39,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:53:39,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:39,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 13:53:39,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:39,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:39,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096899161] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:39,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:39,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2025-03-16 13:53:39,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524705366] [2025-03-16 13:53:39,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:39,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 13:53:39,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:39,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 13:53:39,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:53:39,575 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:39,803 INFO L93 Difference]: Finished difference Result 231 states and 275 transitions. [2025-03-16 13:53:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 13:53:39,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 13:53:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:39,804 INFO L225 Difference]: With dead ends: 231 [2025-03-16 13:53:39,804 INFO L226 Difference]: Without dead ends: 156 [2025-03-16 13:53:39,805 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2025-03-16 13:53:39,805 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 63 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:39,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:53:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-03-16 13:53:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 67. [2025-03-16 13:53:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2025-03-16 13:53:39,816 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 38 [2025-03-16 13:53:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:39,816 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2025-03-16 13:53:39,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2025-03-16 13:53:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 13:53:39,817 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:39,817 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:39,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 13:53:40,021 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,SelfDestructingSolverStorable10 [2025-03-16 13:53:40,021 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:40,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash -577153161, now seen corresponding path program 8 times [2025-03-16 13:53:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:40,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222525003] [2025-03-16 13:53:40,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:53:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:40,026 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-16 13:53:40,038 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:53:40,038 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:53:40,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:41,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:41,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222525003] [2025-03-16 13:53:41,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222525003] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:41,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567370551] [2025-03-16 13:53:41,038 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:53:41,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:41,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:41,040 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) [2025-03-16 13:53:41,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:53:41,076 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-16 13:53:41,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:53:41,090 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:53:41,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:41,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-03-16 13:53:41,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:41,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:53:41,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-16 13:53:41,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2025-03-16 13:53:41,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2025-03-16 13:53:41,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:53:41,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2025-03-16 13:53:41,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 21 [2025-03-16 13:53:41,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 27 [2025-03-16 13:53:41,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 32 [2025-03-16 13:53:41,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:53:41,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 24 [2025-03-16 13:53:41,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:53:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:41,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:42,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 151 [2025-03-16 13:53:43,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:53:43,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100389290214 treesize of output 96094322918 [2025-03-16 13:53:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:44,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567370551] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:44,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:44,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2025-03-16 13:53:44,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754982595] [2025-03-16 13:53:44,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:44,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-03-16 13:53:44,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:44,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-03-16 13:53:44,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=3566, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 13:53:44,715 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 64 states, 64 states have (on average 1.703125) internal successors, (109), 64 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:45,729 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2025-03-16 13:53:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 13:53:45,729 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.703125) internal successors, (109), 64 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 13:53:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:45,730 INFO L225 Difference]: With dead ends: 99 [2025-03-16 13:53:45,730 INFO L226 Difference]: Without dead ends: 96 [2025-03-16 13:53:45,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2069 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=748, Invalid=5572, Unknown=0, NotChecked=0, Total=6320 [2025-03-16 13:53:45,731 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:45,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 106 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:53:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-16 13:53:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 62. [2025-03-16 13:53:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2025-03-16 13:53:45,743 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 38 [2025-03-16 13:53:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:45,743 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2025-03-16 13:53:45,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.703125) internal successors, (109), 64 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2025-03-16 13:53:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 13:53:45,743 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:45,743 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:45,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 13:53:45,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:45,946 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:45,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:45,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1096472211, now seen corresponding path program 9 times [2025-03-16 13:53:45,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:45,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801197412] [2025-03-16 13:53:45,946 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:53:45,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:45,952 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 7 equivalence classes. [2025-03-16 13:53:45,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 13:53:45,987 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:53:45,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:46,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:46,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801197412] [2025-03-16 13:53:46,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801197412] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:46,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203485361] [2025-03-16 13:53:46,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:53:46,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:46,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:46,110 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) [2025-03-16 13:53:46,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 13:53:46,154 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 7 equivalence classes. [2025-03-16 13:53:46,192 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 13:53:46,192 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:53:46,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:46,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:53:46,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:46,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:46,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203485361] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:46,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:46,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2025-03-16 13:53:46,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347119620] [2025-03-16 13:53:46,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:46,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:53:46,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:46,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:53:46,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:53:46,445 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:46,609 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2025-03-16 13:53:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:53:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2025-03-16 13:53:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:46,610 INFO L225 Difference]: With dead ends: 105 [2025-03-16 13:53:46,610 INFO L226 Difference]: Without dead ends: 83 [2025-03-16 13:53:46,610 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2025-03-16 13:53:46,611 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:46,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:53:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-16 13:53:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2025-03-16 13:53:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2025-03-16 13:53:46,624 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 41 [2025-03-16 13:53:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:46,624 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2025-03-16 13:53:46,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2025-03-16 13:53:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 13:53:46,625 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:46,625 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:46,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 13:53:46,829 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,SelfDestructingSolverStorable12 [2025-03-16 13:53:46,830 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:46,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash -47389319, now seen corresponding path program 10 times [2025-03-16 13:53:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:46,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052715257] [2025-03-16 13:53:46,830 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:53:46,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:46,835 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:53:46,846 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-03-16 13:53:46,847 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:53:46,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 30 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:53:48,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:48,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052715257] [2025-03-16 13:53:48,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052715257] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:48,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554022028] [2025-03-16 13:53:48,076 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:53:48,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:48,078 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) [2025-03-16 13:53:48,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 13:53:48,121 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-16 13:53:48,131 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 41 of 44 statements. [2025-03-16 13:53:48,131 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:53:48,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:48,132 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-03-16 13:53:48,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:48,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-16 13:53:48,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2025-03-16 13:53:48,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2025-03-16 13:53:48,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 46 [2025-03-16 13:53:48,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:53:48,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 72 [2025-03-16 13:53:48,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:53:48,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 21 [2025-03-16 13:53:48,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 30 [2025-03-16 13:53:49,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 41 [2025-03-16 13:53:49,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 51 [2025-03-16 13:53:49,632 INFO L349 Elim1Store]: treesize reduction 92, result has 62.1 percent of original size [2025-03-16 13:53:49,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 129 treesize of output 190 [2025-03-16 13:53:49,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2025-03-16 13:53:50,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-16 13:53:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 23 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:50,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:51,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2025-03-16 13:53:51,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2025-03-16 13:53:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:53:51,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554022028] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:51,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:51,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30, 31] total 82 [2025-03-16 13:53:51,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421462155] [2025-03-16 13:53:51,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:51,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2025-03-16 13:53:51,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:51,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2025-03-16 13:53:51,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=5946, Unknown=0, NotChecked=0, Total=6642 [2025-03-16 13:53:51,611 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:58,851 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2025-03-16 13:53:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2025-03-16 13:53:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2025-03-16 13:53:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:58,852 INFO L225 Difference]: With dead ends: 112 [2025-03-16 13:53:58,852 INFO L226 Difference]: Without dead ends: 108 [2025-03-16 13:53:58,853 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 6450 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2757, Invalid=20195, Unknown=0, NotChecked=0, Total=22952 [2025-03-16 13:53:58,853 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 159 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:58,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 125 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-16 13:53:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-16 13:53:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 65. [2025-03-16 13:53:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2025-03-16 13:53:58,872 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 44 [2025-03-16 13:53:58,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:58,872 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2025-03-16 13:53:58,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2025-03-16 13:53:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 13:53:58,872 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:58,873 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:58,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 13:53:59,073 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,SelfDestructingSolverStorable13 [2025-03-16 13:53:59,073 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:59,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:59,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1388299307, now seen corresponding path program 11 times [2025-03-16 13:53:59,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:59,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811754638] [2025-03-16 13:53:59,074 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:53:59,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:59,080 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 47 statements into 8 equivalence classes. [2025-03-16 13:53:59,116 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:53:59,117 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 13:53:59,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 59 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:59,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811754638] [2025-03-16 13:53:59,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811754638] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215131944] [2025-03-16 13:53:59,269 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:53:59,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:59,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:59,271 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) [2025-03-16 13:53:59,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 13:53:59,320 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 47 statements into 8 equivalence classes. [2025-03-16 13:53:59,362 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:53:59,363 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-16 13:53:59,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:59,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:53:59,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:59,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 59 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:53:59,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215131944] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:59,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:59,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2025-03-16 13:53:59,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383557210] [2025-03-16 13:53:59,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:59,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:53:59,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:59,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:53:59,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:53:59,602 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:59,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:59,745 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2025-03-16 13:53:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:53:59,745 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-03-16 13:53:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:59,745 INFO L225 Difference]: With dead ends: 114 [2025-03-16 13:53:59,745 INFO L226 Difference]: Without dead ends: 89 [2025-03-16 13:53:59,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 73 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:53:59,746 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:59,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:53:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-16 13:53:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2025-03-16 13:53:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2025-03-16 13:53:59,764 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 47 [2025-03-16 13:53:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:59,764 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2025-03-16 13:53:59,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2025-03-16 13:53:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 13:53:59,764 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:59,764 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:53:59,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 13:53:59,964 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,SelfDestructingSolverStorable14 [2025-03-16 13:53:59,965 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:59,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash 396777464, now seen corresponding path program 12 times [2025-03-16 13:53:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286377300] [2025-03-16 13:53:59,965 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:53:59,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:59,975 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 50 statements into 8 equivalence classes. [2025-03-16 13:54:00,009 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 13:54:00,009 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-16 13:54:00,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:54:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:54:01,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:54:01,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286377300] [2025-03-16 13:54:01,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286377300] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:54:01,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559515612] [2025-03-16 13:54:01,763 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:54:01,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:54:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:54:01,765 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) [2025-03-16 13:54:01,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 13:54:01,810 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 50 statements into 8 equivalence classes. [2025-03-16 13:54:01,891 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 13:54:01,891 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-16 13:54:01,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:54:01,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-03-16 13:54:01,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:54:01,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:54:01,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-16 13:54:01,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:54:01,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-16 13:54:01,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:54:01,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2025-03-16 13:54:01,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:01,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:01,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:54:01,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 50 [2025-03-16 13:54:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2025-03-16 13:54:02,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:54:02,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:54:02,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2025-03-16 13:54:02,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2025-03-16 13:54:02,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 11 [2025-03-16 13:54:02,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2025-03-16 13:54:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:02,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:54:03,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:54:03,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 133 [2025-03-16 13:54:03,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2025-03-16 13:54:03,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2025-03-16 13:54:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:54:03,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:54:05,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 174 [2025-03-16 13:54:05,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:54:05,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2886631158 treesize of output 2794356470 [2025-03-16 13:54:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:54:06,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559515612] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:54:06,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:54:06,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 34] total 79 [2025-03-16 13:54:06,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398017332] [2025-03-16 13:54:06,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:54:06,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2025-03-16 13:54:06,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:54:06,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2025-03-16 13:54:06,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=5231, Unknown=0, NotChecked=0, Total=6162 [2025-03-16 13:54:06,271 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 79 states, 79 states have (on average 1.5443037974683544) internal successors, (122), 79 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:54:16,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-16 13:54:24,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-16 13:54:34,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-16 13:54:38,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-16 13:54:43,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-16 13:54:47,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]